FARNESYL PROTEIN TRANSFERASE INHIBITOR COMBINATIONS

Abstract: The present invention is concerned with combinations of two or more farnesyl transferase inhibitors for inhibiting the growth of tumour cells and useful in the treatment of cancer.

Description: FARNESYL PROTEIN TRANSFERASE INHIBITOR COMBINATIONS The present invention is concerned with combinations of two or more farnesyl transferase inhibitors for inhibiting the growth of tumour cells and useful in the treatment of cancer. Oncogenes frequently encode protein components of signal transduction pathways which lead to stimulation of cell growth and mitogenesis. Oncogene expression in cultured cells leads to cellular transformation, characterized by the ability of cells to grow in soft agar and the growth of cells as dense foci lacking the contact inhibition exhibited by non-transformed cells. Mutation and/or overexpression of certain oncogenes is frequently associated with human cancer. A particular group of oncogenes is known as ras which have been identified in mammals, birds, insects, mollusks, plants, fungi and yeasts. The family of mammalian ras oncogenes consists of three major members ("isoforms") : H-ras, K-ras and N-ras oncogenes. These ras oncogenes code for highly related proteins generically known as p21 ras . Once attached to plasma membranes, the mutant or oncogenic forms of p21 ras will provide a signal for the transformation and uncontrolled growth of malignant tumor cells. To acquire this transforming potential, the precursor of the p21 ras oncoprotein must undergo an enzymatically catalyzed farnesylation of the cysteine residue located in a carboxyl- terminal tetrapeptide. Therefore, inhibitors of the enzyme that catalyzes this modification, farnesyl protein transferase, will prevent the membrane attachment of p21 ras and block the aberrant growth of ras-transformed tumors. Hence, it is generally accepted in the art that farnesyl transferase inhibitors can be very useful as anticancer agents for tumors in which ras contributes to transformation. Since mutated, oncogenic forms of ras are frequently found in many human cancers, most notably in more than 50 % of colon and pancreatic carcinomas (Kohl et al., Science, vol 260, 1834 - 1837, 1993), it has been suggested that farnesyl tranferase inhibitors can be very useful against these types of cancer. Following further investigations, it has been found that a farnesyl transferase inhibitor is capable of demonstrating antiproliferative effects in vitro and antitumor effects in vivo in a variety of human tumor cell lines with and without ras gene mutations. WO-97/21701 descπbes the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting (ιmιdazoly-5-yl)methyl-2-qumolmone deπvatives of formulas (I), (II) and (HI), as well as intermediates of formula (II) and (HI) that are metabolized in vivo to the compounds of formula (I). The compounds of formulas (I), (II) and (HI) are represented by (I) (π) (in) the pharmaceutically acceptable acid or base addition salts and the stereochemically isomeπc forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; R! IS hydrogen, Ci-i2alkyl, Ar 1 , Ar^Ci-όalkyl, quιnohnylCi -6alkyl, pyndylCi -6alkyl, hydroxyCi .βalkyl, Ci-6alkyloxyCi -6alkyl, mono- or dι(C l -6alkyl)ammoC i -6alkyl, aminoC l -6alkyl, or a radical of formula -Alk!-C(=O)-R 9 , -Alk 1 -S(O)-R 9 or -Alk!-S(O)2-R 9 , wherein Alk^ is Ci -6alkanedιyl, R 9 is hydroxy, Ci-βalkyl, Ci -6alkyloxy, amino, Ci-8alkylammo or Ci -8alkylamιno substituted with Ci-6alkyloxycarbonyl; R2, R3 and R 0" each independently are hydrogen, hydroxy, halo, cyano, Ci -6alkyl, Ci-6alkyloxy, hydroxyCi-6alkyloxy, Ci-6alkyloxyCι_6alkyloxy, amιnoCι_6alkyl- oxy, mono- or dι(Ci-6alkyl)ammoCi-6alkyloxy, Ar 1 , Ar^Ci-όalkyl, Ar2oxy, Ar^Ci-όalkyloxy, hydroxycarbonyl, Ci-6alkyloxycarbonyl, trihalomethyl, trihalomethoxy, C2-6alkenyl, 4,4-dimethyloxazolyl; or when on adjacent positions R 2 and R 3 taken together may form a bivalent radical of formula -O-CH2-O- (a-1), -O-CH2-CH2-O- (a-2), -O-CH=CH- (a-3), -O-CH2-CH2- (a-4), -O-CH2-CH2-CH2- (a-5), or -CH=CH-CH=CH- (a-6); R4 and R^ each independently are hydrogen, halo, Ar , Ci-βalkyl, hydroxyCi-6alkyl, Ci-6alkyloxyCι_6 a lkyl, Cι_6alkyloxy, Cι _6alkylthio, amino, hydroxycarbonyl, Cι_6alkyloxycarbonyl, Ci-6alkylS(O)Ci -6alkyl or Ci-6alkylS(O)2Cι_6alkyl; R^ and R^ each independently are hydrogen, halo, cyano, Ci -6alkyl, Cι _6alkyloxy, Ar 2 oxy, trihalomethyl, Ci-6alkylthio, di(Ci-6alkyl)amino, or when on adjacent positions R^ and R^ taken together may form a bivalent radical of formula -O-CH2-O- (c-1), or -CH=CH-CH=CH- (c-2); R8 is hydrogen, C1 -βalkyl, cyano, hydroxycarbonyl, Ci -6alkyloxycarbonyl, C 1 _6alkylcarbonylC 1 _6alkyl , cyanoC 1 -6alkyl, C 1 -6alkyloxycarbonylC 1 _6alkyl , carboxyCi -6alkyl, hydroxyCi -όalkyl, aminoCi -6alkyl, mono- or di(Cι_6alkyl)- aminoCi-6alkyl, imidazolyl, haloCi-6alkyl, Ci-6aikyloxyCi-6alkyl, aminocarbonylCι _6alkyl, or a radical of formula -O-RlO (b-1), -S-RlO (b-2), -N-RllR!2 ( -3), wherein R 0 is hydrogen, Ci-6alkyl, Ci-6alkylcarbonyl, Ar 1 , Ar 2 Ci -6alkyl, Ci-6alkyloxycarbonylCi-6alkyl, or a radical or formula -Alk 2 -ORl3 or -Alk 2 -NR 14 R 15 ; R 1 1 is hydrogen, Ci-i2alkyl, Ar or Ar 2 Ci-6alkyl; Rl2 is hydrogen, Ci-6alkyl, Cι_i6alkylcarbonyl, Ci -6alkyloxycarbonyl, Ci-6alkylaminocarbonyl, Ar , Ar 2 Ci-6alkyl, Ci -6alkylcarbonyl- Cι _6alkyl, a natural amino acid, Arlcarbonyl, Ar^Ci-όalkylcarbonyl, aminocarbonylcarbonyl, Ci -6alkyloxyCi -6alkylcarbonyl, hydroxy, Ci -6alkyloxy, aminocarbonyl, di(Ci-.6alkyl)aminoCι_6alkylcarbonyl, amino, C1 -6alkylamino, Ci -6alkylcarbonylamino, or a radical or formula -Alk 2 -OR 13 or -Alk 2 -NR 14 R 15 ; wherein Alk 2 is Cι_6alkanediyl; Rl3 is hydrogen, Cι_6alkyl, Ci -6alkylcarbonyl, hydroxy- Ci-6alkyl, Ar 1 or Ar Ci-6alkyl; R 14 is hydrogen, Ci -6alkyl, Ar or Ar 2 Cι _6alkyl; Rl5 i s hydrogen, Ci -6alkyl, Ci_6alkylcarbonyl, Ar or Ar 2 Cι_6alkyl; Rl7 is hydrogen, halo, cyano, Ci-6alkyl, Ci -6alkyloxycarbonyl, Ar 1 ; R 1 ^ is hydrogen, Ci -6alkyl, Ci-6alkyloxy or halo; R l 9 is hydrogen or Ci -galkyl; Arl is phenyl or phenyl substituted with Ci -6alkyl, hydroxy, amino, Cι_6alkyloxy or halo; and Ar 2 is phenyl or phenyl substituted with Ci-6 a 'kyl, hydroxy, amino, Ci-6alkyloxy or halo. WO-97/16443 concerns the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting compounds of formula (IV), as well as intermediates of formula (V) and (VI) that are metabolized in vivo to the compounds of formula (IV). The compounds of formulas (IV), (V) and (VI) are represented by (IV) (V) (VI) the pharmaceutically acceptable acid or base addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; R 1 is hydrogen, -I2alkyl, Ar 1 , Ar 2 Ci-6alkyl, quinolinylCi -6alkyl, pyridyl- Cι_6alkyl, hydroxyCi-6alkyl, Cι -.6alkyloxyCi-6alkyl, mono- or di(Cι_6alkyl)- aminoCi -6alkyl, aminoCi -6alkyl, or a radical of formula -Alk 1 -C(=O)-R 9 , -Alk!-S(O)-R 9 or -Alk!-S(O)2-R 9 , wherein Alk 1 is Cι_6alkanediyl, R 9 is hydroxy, Ci -6alkyl, Ci -6alkyloxy, amino, Ci -salkylamino or Ci-8 al kyl mino substituted with Cι-_6alkyloxycarbonyl; R 2 and R 3 each independently are hydrogen, hydroxy, halo, cyano, Ci -6alkyl, Ci-6alkyloxy, hydroxyCι_6alkyloxy, Ci -6alkyloxyCi-6alkyloxy, amino- Cι_6alkyloxy, mono- or di(Ci-6alkyl)aminoCi -6alkyloxy, Ar 1 , Ar Ci -6alkyl, Ar oxy, Ar Cι_6alkyloxy, hydroxycarbonyl, Ci -6alkyloxycarbonyl, trihalomethyl, trihalomethoxy, C2-6 a lkenyl; or when on adjacent positions R 2 and R 3 taken together may form a bivalent radical of formula -O-CH2-O- (a-1), -O-CH2-CH2-O- (a-2), -O-CH=CH- (a-3), -O-CH2-CH2- (a-4), -O-CH2-CH2-CH2- (a-5), or -CH=CH-CH=CH- (a-6); R 4 and R 5 each independently are hydrogen, Ar 1 , d^alkyl, Cι- 6 alkyloxyCι- 6 alkyl, C]- 6 alkylthio, amino, hydroxycarbonyl, Cj- 6 alkyloxycarbonyl, Cι- 6 alkylS(O)Cι- 6 alkyl or Cι- 6 alkylS(O) 2 C,- 6 alkyl; R^ and R^ each independently are hydrogen, halo, cyano, C1 _6alkyl, Ci -6alkyloxy or Ar 2 oxy; R^ is hydrogen, Ci-6 al kyl, cyano, hydroxycarbonyl, Cι_6alkyloxycarbonyl, Cι_6alkyl- carbonylCi-6alkyl, cyanoCi-6alkyl, Ci-6alkyloxycarbonylCι_6alkyl, hydroxy- carbonylCι_6alkyl, hydroxyCi-6 a lkyl, aminoCi-6alkyl, mono- or di(Ci -6alkyl)- aminoCi-6alkyl, haloCi-6 a lkyl, Ci-6alkyloxyCι_6alkyl, aminocarbonylCi-6alkyl, Ar 1 , Ar 2 Ci-6 a lkyloxyCi-6alkyl, Ci-6alkylthioCi-6alkyl; R ( ^ is hydrogen, Cι_6alkyl, Cι_6alkyloxy or halo; R is hydrogen or Cι _6 al kyl; Ar 1 is phenyl or phenyl substituted with Ci -6alkyl, hydroxy, amino, Ci-6aikyloxy or halo; Ar 2 is phenyl or phenyl substituted with Ci -6 a l l, hydroxy, amino, Ci-6alkyloxy or halo. WO-98/40383 concerns the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting compounds of formula (VII) the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; -A- is a bivalent radical of formula -CH=CH- (a-1), -CH2-S- (a-6), -CH2-CH2- (a-2), -CH2-CH2-S- (a-7), -CH2-CH2-CH2- (a-3), -CH=N- (a-8), -CH2-O- (a-4), -N=N- (a-9), or -CH2-CH2-O- (a-5), -CO-NH- (a-10); wherein optionally one hydrogen atom may be replaced by Cι_4alkyl or Ar 1 ; R 1 and R 2 each independently are hydrogen, hydroxy, halo, cyano, Ci -6alkyl, trihalomethyl, trihalomethoxy, C2-6alkenyl, Cι_6alkyloxy, hydroxyCi-6alkyloxy, Cι -6 a lkyloxyCι -6alkyloxy, Ci-6 al kyloxycarbonyl, aminoCi -6alkyloxy, mono- or di(Ci-6alkyl)aminoCi-6alkyloxy, Ar 2 , Ar 2 -Cι_6alkyl, Ar 2 -oxy, Ar 2 -Ci-6 a lkyloxy; or when on adjacent positions R and R 2 taken together may form a bivalent radical of formula -O-CH2-O- (b-1), -O-CH2-CH2-O- (b-2), -O-CH=CH- (b-3), -O-CH2-CH2- (b-4), -O-CH2-CH2-CH2- (b-5), or -CH=CH-CH=CH- (b-6); R 3 and R 4 each independently are hydrogen, halo, cyano, Ci-6 a lkyl, Ci -6alkyloxy, Ar^-oxy, Cι_6alkylthio, di(Ci -6alkyl)amino, trihalomethyl, trihalomethoxy, or when on adjacent positions R 3 and R 4 taken together may form a bivalent radical of formula -O-CH2-O- (c-1), -O-CH2-CH2-O- (c-2), or -CH=CH-CH=CH- (c-3); R5 is a radical of formula wherein R 13 is hydrogen, halo, Ar 4 , Ci-6 a lkyl, hydroxyCι -_6alkyl, Ci-6alkyloxy- Ci-6 al kyl, Ci-6alkyloxy, Ci -6alkylthio, amino, Cι_6alkyloxy- carbonyl, Ci-6 a lkylS(O)Ci -6alkyl or Ci -6alkylS(O)2Cι _6alkyl; R 14 is hydrogen, Ci-6alkyl or di(Ci-4alkyl)aminosulfonyl; R6 is hydrogen, hydroxy, halo, Ci -6alkyl, cyano, haloCi-6alkyl, hydroxyCι_6alkyl, cyanoCi-6alkyl, aminoCι _6alkyl, Ci -6alkyloxyCι-.6alkyl, C 1 _6alkylthioC 1 _6alkyl , aminocarbonylC 1 -6alkyl, C 1 _6 a lkyloxycarbonylC 1 -6alkyl, C 1 _6alkylcarbonyl-C 1 -.βalkyl, Cι_6 al kyloxycarbonyl, mono- or di(Cι -.6alkyl)aminoCi -6alkyl, Ar^, Ar5-Ci_6alkyloxyCi_6alkyl; or a radical of formula -O-R 7 (e- 1 )' -S-R7 (e- 2 ), -N-R8R 9 (e-3), wherein R 7 is hydrogen, Ci -6alkyl, Ci-6alkylcarbonyl, Ar6-Ci -6alkyl, Ci-6 al kyloxycarbonylCι_6alkyl, or a radical of formula -Alk-OR 1 ^ or -Alk-NR R 12 ; R8 is hydrogen, Cι_6alkyl, Ar 7 or Ar^-Ci-όalkyl; R 9 is hydrogen, Ci -6alkyl, Ci-6alkylcarbonyl, Ci -6alkyloxycarbonyl, Ci-6 a lkylaminocarbonyl, Ar^, Ar^-Ci-6alkyl, Ci -6alkylcarbonyl- Cι_6alkyl, Ar^-carbonyl, Ar^-Cι_6alkylcarbonyl, aminocarbonyl- carbonyl, Ci -βalkyloxyCi-όalkylcarbonyl, hydroxy, Ci -6alkyloxy, aminocarbonyl, di(Ci-^alkyl)aminoCi -6alkylcarbonyl, amino, C 1 _6alkylamino, C 1 -όalkylcarbonylamino, or a radical or formula -Alk-OR 10 or -Alk-NR 1 iR 12 ; wherein Alk is Ci-6alkanediyl; R 1 ^ is hydrogen, Cι _6alkyl, Ci -6alkylcarbonyl, hydroxyCi -6alkyl, Ar 9 or Ar 9 -Cι_6alkyl; R 11 is hydrogen, Cι_6alkyl, Ci .βalkylcarbonyl, Ar 1 ^ or Ar 10 -Ci-6 a lkyl; R 12 is hydrogen, Ci-6alkyl, Ar 1 1 or Ar^-Ci-βalkyl; and Ar 1 to Ar 1 1 are each independently selected from phenyl; or phenyl substituted with halo, Ci-6alkyl, Cι_6alkyloxy or trifluoromethyl. WO-98/49157 concerns the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting compounds of formula (VET) the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; R 1 and R 2 each independently are hydrogen, hydroxy, halo, cyano, Ci-βalkyl, trihalomethyl, trihalomethoxy, C2-6 al kenyl, Ci-6 al kyloxy, hydroxyCi -βaikyloxy, Ci -6 a lkyloxyCi -6 a lkyloxy, Ci-6alkyloxycarbonyl, aminoCi -6alkyloxy, mono- or di(Ci-6alkyl)aminoCi-6alkyloxy, Ar 1 , Aτ^Cι.(,a\ky\, Arioxy or A^Ci -όalkyloxy; R 3 and R 4 each independently are hydrogen, halo, cyano, Ci -6alkyl, Ci -6alkyloxy, A^oxy, Cι_6alkylthio, di(Ci -6alkyl)amino, trihalomethyl or trihalomethoxy; R5 is hydrogen, halo, Cι _6alkyl, cyano, haloCi -6alkyl, hydroxyCi-6alkyl, cyanoCi-6 a lkyl, aminoCi -6alkyl, Ci-6alkyloxyCι_6alkyl, C i _6alkylthioC i _6alkyl , aminocarbonylC i .βalkyl , C i _6 a lkyloxycarbonylC i -6alkyl, C i _6alkylcarbonyl-C i -6alkyl, Ci_6 al kyloxycarbonyl, mono- or di(Ci-6alkyl)aminoCι-.6alkyl, Ar 1 , A^Ci-όalkyloxyCi-ό^kyl; or a radical of formula -O-R 10 (a-1). _S-R10 (a-2), -N-Rl lRl2 ( a -3), wherein Ci-6 a lkyloxycarbonylCι_6alkyl, or a radical of formula -Alk-OR 13 or -Alk-NR 14 R 15 ; R 1 J - is hydrogen, Cι_6alkyl, Ar 1 or A^Ci _6alkyl; R 12 is hydrogen, Cι_6alkyl, Cι_6alkylcarbony], Ci-6alkyloxycarbonyl, Ci-6 a lkylaminocarbonyl, Ar 1 , Ar J -Ci-όalkyl, Ci -6alkylcarbonyl- Cι_6alkyl, A^carbonyl, AriCi-όalkylcarbonyl, aminocarbonyl- carbonyl, Cι _6alkyloxyCi-6aιkylcarbonyl, hydroxy, Ci -6alkyloxy, aminocarbonyl, di(Ci -6alkyl)aminoCi-6alkylcarbonyl, amino, Ci-6alkylamino, Cι_6alkylcarbonylamino, or a radical or formula -Alk-OR 13 or -Alk-NR 14 R 15 ; wherein Alk is Ci-6alkanediyl; R 13 is hydrogen, Ci -6alkyl, Ci-6alkylcarbonyl, hydroxy- Ci -6 a -kyl, Ar 1 or AriCi-όalkyI; R 14 is hydrogen, Ci-6 a lkyl, Ar 1 or A^Ci^a-kyl; R 1 ^ is hydrogen, Ci -6alkyl, Ci .βalkylcarbonyl, Ar 1 or AriCi-όalkyl; R6 is a radical of formula wherein R^is hydrogen, halo, Ar 1 , Ci -6alkyl, hydroxyCi -όalkyl, Ci-6aιkyloxy- Cι_6alkyl, Ci -6alkyloxy, Ci -6alkylthio, amino, Ci-6alkyloxycarbonyl, Ci-6alkylthioCi -6alkyl, Ci-6alkylS(O)Cι_6alkyl or Ci -6alkylS(O)2Cι .-6alkyl; R 7 is hydrogen, Ci -6alkyl or di(Ci-4alkyl)aminosulfonyl; R 7 is hydrogen or Ci -6alkyl provided that the dotted line does not represent a bond; R 8 is hydrogen, Ci -6alkyl or Ar 2 CH2 or Het 1 CH2; R 9 is hydrogen, Ci-6alkyl , Ci -6alkyloxy or halo; or R8 and R 9 taken together to form a bivalent radical of formula -CH=CH- (c-1), -CH2-CH2- (c-2), -CH2-CH2-CH2- (c-3), -CH2-O- (c-4), or -CH2-CH2-O- (c-5); Ar 1 is phenyl; or phenyl substituted with 1 or 2 substituents each independently selected from halo, Ci -6alkyl, Ci -6alkyloxy or trifluoromethyl; Ar 2 is phenyl; or phenyl substituted with 1 or 2 substituents each independently selected from halo, Ci -6alkyl, Ci -6alkyloxy or trifluoromethyl; and Het 1 is pyridinyl; pyridinyl substituted with 1 or 2 substituents each independently selected from halo, Ci-6alkyl, Cι_6alkyloxy or trifluoromethyl. WO-00/39082 concerns the preparation, formulation and pharmaceutical properties of farnesyl protein transferase inhibiting compounds of formula (IX) or the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof, wherein =X'-X 2 -X 3 - is a trivalent radical of formula =N-CR 6 =CR 7 - (x-1), =CR 6 -CR 7 =CR 8 - (x-6), =N-N=CR 6 - (x-2), =CR 6 -N=CR 7 - (x-7), =N-NH-C(=O)- (x-3), =CR 6 -NH-C(=O)- (x-8), or =N-N=N- (χ- 4 ), =CR 6 -N=N- (x-9); =N-CR 6 =N- (x-5), wherein each R 6 , R 7 and R 8 are independently hydrogen, C^alkyl, hydroxy, Cι- 4 alkyloxy, aryloxy, Cι- alkyloxycarbonyl, hydroxyCι- alkyl, Cι- 4 alkyloxyCι- alkyl, mono- or di(Cι- 4 alkyl)aminoCι- alkyl, cyano, amino, thio, Cι- alkylthio, arylthio or aryl; >Y'-Y 2 - is a trivalent radical of formula >CH-CHR 9 - (y-1), >C=N- (y-2), >CH-NR 9 - (y-3),or >C=CR 9 - (y-4); wherein each R 9 independently is hydrogen, halo, halocarbonyl, aminocarbonyl, hydroxyCι_ alkyl, cyano, carboxyl, C]. 4 alkyl, Cι- alkyloxy, Cι- 4 alkyloxyCι- alkyl, Cι- alkyloxycarbonyl, mono- or di(Cι- 4 alkyl)amino, mono- or di(Cι- alkyl)aminoCι- 4 alkyl, aryl; r and s are each independently 0, 1, 2, 3, 4 or 5; t is O, 1, 2 or 3; each R 1 and R 2 are independently hydroxy, halo, cyano, Cι_6alkyl, trihalomethyl, trihalomethoxy, C 2 - 6 a lkenyl, Cι_ 6 alkyloxy, hydroxyCι- 6 alkyloxy, Cι- 6 alkylthio, Cι_ 6 alkyloxyCι_ 6 alkyloxy, Ci- 6 a lkyloxycarbonyl, aminoCι- 6 alkyloxy, mono- or di(Cι- 6 alkyl)amino, mono- or di(Cι-6alkyl)aminoCι- 6 alkyloxy, aryl, arylC]_ 6 alkyl, aryloxy or arylCi- ό alkyloxy, hydroxycarbonyl, Cι_ 6 alkyloxycarbonyl, aminocarbonyl, aminoCι_ 6 alkyl, mono- or di(Cι- alkyl)aminocarbonyl, mono- or di(Cι_ 6 alkyl)aminoC]- 6 alkyl; or two R 1 or R 2 substituents adjacent to one another on the phenyl ring may independently form together a bivalent radical of formula -O-CH 2 -O- fa "1 )* -O-CH 2 -CH 2 -O- (a-2), -O=CH=CH- (a-3), -O-CH 2 -CH 2 - (a-4), -O-CH 2 -CH 2 - CH 2 - (a-5), or -CH=CH-CH=CH- (a-6); R 3 is hydrogen, halo, Cι_ 6 alkyl, cyano, haloCι- 6 alkyl, hydroxyCι- 6 alkyl, cyanoCι- 6 alkyl, aminoCι- 6 alkyl, Cι_ 6 alkyloxyCι. 6 alkyl, Cι- 6 alkylthioCj- 6 alkyl, aminocarbonylCι- 6 alkyl, hydroxycarbonyl, hydroxycarbonylCi- 6 alkyl, C i - 6 alkyloxycarbonylC i _ alkyl, C i - alkylcarbonylC \ - 6 alkyl, C ] - alkyloxycarbonyl, aryl, arylCι- 6 alkyloxyCi-6alkyl, mono- or d - ό alky aminoCi- ό alkyl; or a radical of formula -O-R 10 (b-D, -S-R 10 (b- ), -NR π R 12 0>-3), wherein R 10 is hydrogen, Cι- alkyl, Cι- 6 alkylcarbonyl, aryl, aryld- alkyl, Cι_ 6 alkyloxycarbonylCι-6alkyl, or a radical of formula -Alk-OR 13 or -Alk-NR 14 R 15 ; R 11 is hydrogen, Cι- 6 alkyl, aryl or arylQ^alkyl; R 12 is hydrogen, Cι- 6 alkyl, aryl, hydroxy, amino, Cι- 6 alkyloxy, Cι- 6 alkylcarbonylCι- 6 alkyl, arylC βalkyl, Cι- 6 alkylcarbonylamino, mono- or di(Cι- 6 alkyl)amino, C]- 6 alkylcarbonyl, aminocarbonyl, arylcarbonyl, haloC ! - ό alkylcarbonyl, arylC i - 6 alkylcarbonyl , C i - 6 alkyloxycarbonyl, Cι_ alkyloxyCι - ό alkylcarbonyl, mono- or di(C 1 . 6 alkyl)aminocarbonyl wherein the alkyl moiety may optionally be substituted by one or more substituents independently selected from aryl or Cι- 3 alkyloxycarbonyl, aminocarbonylcarbonyl, mono- or di(Cι- 6 alkyl)aminoCι- 6 alkylcarbonyl, or a radical or formula -Alk-OR 13 or -Alk-NR 14 R 15 ; wherein Alk is Cι_ 6 alkanediyl; R 13 is hydrogen, Cι_ 6 alkyl, Cι_ 6 alkylcarbonyl, hydroxyCι_ alkyl, aryl or arylC]. 6 alkyl; R 14 is hydrogen, C]_ 6 alkyl, aryl or arylCι_ alkyl; R 15 is hydrogen, Cι- 6 alkyl, Cι_ 6 alkylcarbonyl, aryl or arylCι- 6 alkyl; R »4 i • s a radical of formula wherein R , 16 is hydrogen, halo, aryl, C]. 6 alkyl, hydroxyCι- 6 alkyl, Cι_ 6 alkyloxyCι- 6 alkyl, Cι- 6 alkyloxy, Cι- 6 alkylthio, amino, mono- or di(C]- 4 alkyl)amino, hydroxycarbonyl, Cι- 6 alkyloxycarbonyl, Cι_6alkylthioCι- 6 alkyl, Cι- 6 alkylS(O)Cι- 6 alkyl or Cι. 6 alkylS(O) 2 Cι- 6 alkyl; R 16 may also be bound to one of the nitrogen atoms in the imidazole ring of formula (c-l) or (c-2), in which case the meaning of R 16 when bound to the nitrogen is limited to hydrogen, aryl, Cι_ 6 alkyl, hydroxyd- ό alkyl, Cι_ 6 alkyloxyC]- 6 alkyl, Ci- 6 alkyloxycarbonyl, Cι- 6 alkylS(O)C 1 - 6 alkyl or d- 6 alkylS(O) 2 d- 6 alkyl; R 17 is hydrogen, d-βalkyl, d-6 a lkyloxyd- 6 alkyl, aryld_ 6 alkyl, trifluoromethyl or di(Cι- alkyl)aminosulfonyl; R 5 is C]. 6 alkyl , Cj- 6 alkyloxy or halo; aryl is phenyl, naphthalenyl or phenyl substituted with 1 or more substituents each independently selected from halo, Cι_ 6 alkyl, d- 6 alkyloxy or trifluoromethyl . Other farnesyl transferase inhibitors have been described in the literature including those described below which have either the same mechanism of action as those described in WO-97/21701 or a different mechanism for example which involves competitive inhibition with respect to farnesyl pyrophosphate. Examples of such other farnesyl protein transferase inhibitors include Arglabin (i.e.l(R)-10-epoxy-5(S),7(S)- guaia-3(4),ll(13)-dien-6,12-olide descibed in WO-98/28303 (NuOncology Labs); perrilyl alcohol described in WO-99/45912 (Wisconsin Genetics); SCH-66336, i.e. (+)- (R)-4-[2-[4-(3,10-dibromo-8-chloro-5,6-dihydro-l lH-benzo[5,6]cyclohepta[l,2- b]pyridin-l l-yl)piperidin-l-yl]-2-oxoethyl]piperidine-l-carboxamide, described in U.S. Patent No. 5874442 (Schering); L778123, i.e. l-(3-chlorophenyl)-4-[l-(4- cyanobenzyl)-5-imidazolylmethyl]-2-piperazinone, described in WO-00/01691 (Merck); compound 2(S)-[2(S)-[2(R)-amino-3-mercapto]propylamino-3(S)-methyl]- pentyloxy-3-phenylpropionyl-methionine sulfone described in WO-94/10138 (Merck); and BMS 214662, i.e. (R)-2,3,4,5-tetrahydro-l-(ffl-imidazol-4-ylmethyl)-3- (phenylmethyl)-4-(2-thienylsulphonyl)-lH-l,4-benzodiazapine-7-carbonitrile, described in WO 97/30992 (Bristol Myers Squibb) and Pfizer compounds (A) and (B) described in WO-00/12498 and WO-00/12499: (A) (B) Despite the advantages of using a farnesyl transferase inhibitor to treat cancer, there is still a need to increase the inhibitory efficacy of such inhibitors against tumor growth and also to provide a means for the use of lower dosages of such compounds to reduce the potential of adverse toxic side effects to the patient. It is an object of the invention to provide a therapeutic combination of a farnesyl transferase inhibitor of the type particularly described above and at least one further farnesyl transferase inhibitor which has an advantageous inhibitory effect against tumor cell growth, in comparison with the respective effects shown by the individual components of the combination. According to the invention therefore we provide a combination of a farnesyl transferase inhibitor of formula (I), (II), (III), (IV), (V), (VI), (VII), (VH ) or (IX) above, in particular a compound of formula (I), (H) or (ILT): (I) (ID (HI) the pharmaceutically acceptable acid or base addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; R 1 is hydrogen, Ci -i2alkyl, Ar 1 , Ar 2 Ci -6alkyl, quinolinylCi-6alkyl, pyridyl- Ci-6 al kyl, hydroxyCι_6alkyl, Ci-6alkyloxyCι_6alkyl, mono- or di(Ci -6alkyl)- aminoC ι _6alkyl, aminoCι_6alkyl, or a radical of formula -Alk 1 -C(=O)-R 9 , -Alki-S^-R 9 or -Alk 1 -S(O)2-R 9 , wherein Alk is C i -6alkanediyl, R 9 is hydroxy, Ci-6alkyl, Ci .βalkyloxy, amino, Ci-8alkylamino or Ci-8alkylamino substituted with Ci -6alkyloxycarbonyl; R 2 , R 3 and R 1 ^ each independently are hydrogen, hydroxy, halo, cyano, Ci _6alkyl, Ci-6alkyloxy, hydroxyCi-6alkyloxy, Ci -6alkyloxyCi-6alkyloxy, aminoCι_6alkyloxy, mono- or di(Cι -6alkyl)aminoCi-6alkyloxy, Ar 1 , Ar 2 Ci-6alkyl, Ar oxy, Ar 2 Ci-6alkyloxy, hydroxycarbonyl, Ci-6alkyloxycarbonyl, trihalomethyl, trihalomethoxy, C2-6 a lkenyl, 4,4- dimethyloxazolyl; or when on adjacent positions R 2 and R 3 taken together may form a bivalent radical of formula -O-CH2-O- (a-1), -O-CH2-CH2-O- (a-2), -O-CH=CH- (a-3), -O-CH2-CH2- (a-4), - -OO--CCHH22--CCHH22--CCHH22-- (a-5), or -CH=CH-CH=CH- (a-6); R 4 and R^ each independently are hydrogen, halo, Ar 1 , Ci -βalkyl, hydroxyCi -6alkyl, Ci-6alkyloxyCι_6alkyl , Ci-6 a lkyloxy, Cι_6alkylthio, amino, hydroxycarbonyl, Ci-6 a lkyloxycarbonyl, Ci-6 a lkylS(O)Cι_6alkyl or Ci -6alkylS(O)2Cι_6alkyl; R^ and R 7 each independently are hydrogen, halo, cyano, Ci -6alkyl, Ci-6alkyloxy, Ar 2 oxy, trihalomethyl, Cι_6alkylthio, di(Cι_6alkyl)amino, or when on adjacent positions R° and R ' taken together may form a bivalent radical of formula -O-CH2-O- (c-l), or -CH=CH-CH=CH- (c-2); R 8 is hydrogen, Ci -6alkyl, cyano, hydroxycarbonyl, Ci-6alkyloxycarbonyl, Cι_ 6 alkyl- carbonylCι-6alkyl, cyanoCi -6alkyl, Ci-6alkyloxycarbonylCi-6alkyl, carboxy- Ci-6alkyl, hydroxyCi -6alkyl, aminoCi -6alkyl, mono- or di(Ci -6alkyl)amino- Cι_6alkyl, imidazolyl, haloCi-6alkyl, Ci-6alkyloxyCi-6alkyl, aminocarbonyl- Cι_6alkyl, or a radical of formula -O-RlO (b- 1 )' -S-RiO (b-2), -N-Rl lRl2 (b-3), wherein R^is hydrogen, Ci -6alkyl, Ci -6alkylcarbonyl, Ar 1 , Ar 2 Ci-6 a lkyl, Ci-6alkyloxycarbonylCi -6alkyl, or a radical or formula -Alk -OR 13 or -Alk 2 -NR 14 R 15 ; R^ is hydrogen, Ci-I2alkyl, Ar 1 or Ar 2 Ci-6alkyl; R 12 is hydrogen, Ci -6alkyl, Ci -i6alkylcarbonyl, Ci -6alkyloxycarbonyl, Ci-6alkylaminocarbonyl, Ar 1 , Ar 2 Ci -6alkyl, Ci -6alkylcarbonyl- Cι_6alkyl, a natural amino acid, A^carbonyl, Ar 2 Ci -6alkylcarbonyl, aminocarbonylcarbonyl, Cι_6alkyloxyCi-6alkylcarbonyl, hydroxy, Ci-6alkyloxy, aminocarbonyl, di(Ci-6alkyl)aminoCi -6alkylcarbonyl, amino, Cι_6alkylamino, Ci -βalkylcarbonylamino, or a radical or formula -Alk -OR 13 or -Alk -NR 14 R 15 ; wherein Alk 2 is Ci -6alkanediyl; R 13 is hydrogen, Ci -6aikyl, Cι_6alkylcarbonyl, hydroxy- Ci-6alkyl, Ar 1 or Ar 2 Ci -6alkyl; R 14 is hydrogen, Ci -6alkyl, Ar 1 or Ar 2 Ci- 6 alkyl; R 1 ^ is hydrogen, Ci -6alkyl, Ci -6alkylcarbonyl, Ar 1 or Ar 2 Cι_6alkyl; R 17 is hydrogen, halo, cyano, Ci .βalkyl, Ci -6alkyloxycarbonyl, Ar 1 ; R 18 is hydrogen, Ci -6alkyl, Ci-6alkyloxy or halo; R 19 is hydrogen or Ci - 6 alkyl; Ar 1 is phenyl or phenyl substituted with Cι_6alkyl, hydroxy, amino, Ci -βalkyloxy or halo; and Ar 2 is phenyl or phenyl substituted with Cι_6alkyl, hydroxy, amino, Ci-βalkyloxy or halo; and at least one further farnesyl transferase inhibitor. The above described combinations are hereinafter referred to as combinations according to the invention. These combinations may provide a synergistic effect whereby they demonstrate an advantageous therapeutic effect which is greater than that which would have been expected from the effects of the individual components of the combinations. In Formulas (I), (II) and (HI), R 4 or R^ may also be bound to one of the nitrogen atoms in the imidazole ring. In that case the hydrogen on the nitrogen is replaced by R 4 or R^ and the meaning of R 4 and R^ when bound to the nitrogen is limited to hydrogen, Ar 1 , Ci -6alkyl, hydroxyCi -6alkyl, Ci -6alkyloxyCi-6alkyl, Ci -6alkyloxycarbonyl, Ci-6alkylS(O)Cι_6alkyl, Ci-6alkylS(O)2Ci -6alkyl. Preferably the substituent R 18 is situated on the 5 or 7 position of the quinolinone moiety and substituent R 19 is situated on the 8 position when R 1 ^ is on the 7-position. Interesting compounds are these compounds of formula (I) wherein X is oxygen. Also interesting compounds are these compounds of formula (I) wherein the dotted line represents a bond, so as to form a double bond. Another group of interesting compounds are those compounds of formula (I) wherein R 1 is hydrogen, Ci -6alkyl, Ci -6alkyloxyCi -6alkyl, di(Cι_6alkyl)aminoCι -,6alkyl, or a radical of formula -Alk 1 -C(=O)-R 9 , wherein Alk 1 is methylene and R 9 is Ci-8alkyl- amino substituted with Ci-6alkyloxycarbonyl. Still another group of interesting compounds are those compounds of formula (I) wherein R 3 is hydrogen or halo; and R 2 is halo, Ci -6alkyl, C2-6alkenyl, Ci .βalkyloxy, trihalomethoxy or hydroxyCi -galkyloxy. A further group of interesting compounds are those compounds of formula (I) wherein R 2 and R 3 are on adjacent positions and taken together to form a bivalent radical of formula (a-1), (a-2) or (a-3). A still further group of interesting compounds are those compounds of formula (I) wherein R^ is hydrogen and R 4 is hydrogen or Ci -6alkyl. Yet another group of interesting compounds are those compounds of formula (I) wherein R "7 is hydrogen; and R" is Ci -6alkyl or halo, preferably chloro, especially 4-chloro. A particular group of compounds are those compounds of formula (I) wherein R 8 is hydrogen, hydroxy, haloCi -6alkyl, hydroxyCi -6alkyl, cyanoCi-6alkyl, Cι_6alkyloxy- carbonylCi -6alkyl, imidazolyl, or a radical of formula -NRl 1R1 wherein R 1 1 is hydrogen or Ci -i2alkyl and R 12 is hydrogen. Cι_6alkyl, Ci-6 al kyloxy, hydroxy, Ci-6 a lkyloxyCi-6alkylcarbonyl, or a radical of formula -Alk 2 -OR 13 wherein R 13 is hydrogen or Ci -6alkyl. Preferred compounds are those compounds wherein R 1 is hydrogen, Ci-βalkyl, Ci-6alkyloxyCi-6alkyl, di(Ci-6alkyl)aminoCi-6 a lkyl, or a radical of formula -Alk 1 -C(=O)-R 9 , wherein Alk 1 is methylene and R 9 is Ci -Salkylamino substituted with Ci-6alkyloxycarbonyl; R 2 is halo, Cι_6alkyl, C2-6alkenyl, Cι _6alkyloxy, trihalomethoxy, hydroxyCi_6alkyloxy or Ar 1 ; R 3 is hydrogen; R 4 is methyl bound to the nitrogen in 3-position of the imidazole; R^ is hydrogen; R^ is chloro; R "7 is hydrogen; R8 is hydrogen, hydroxy, haloCi -6alkyl, hydroxyCi -6alkyl, cyanoCi -βalkyl, Ci-6alkyloxycarbonylCι_6alkyl, imidazolyl, or a radical of formula -NR^R 12 wherein R 1 is hydrogen or Cι _i2alkyl and R 12 is hydrogen, Ci -6alkyl, Cι_6alkyloxy, Ci-6alkyloxyCi-6 a lkylcarbonyl, or a radical of formula -Alk 2 -OR 13 wherein R 13 is Ci-6alkyl; R 17 is hydrogen and R 18 is hydrogen. Most preferred compounds are 4-(3-chlorophenyl)-6-[(4-chlorophenyl)hydroxy(l-methyl-lH-imidazol-5-yl)methyl]- 1 -methyl-2( 1 H)-quinolinone, 6- [amino(4-chlorophenyl)- 1 -methyl- 1 H-imidazol-5 -ylmethyl] -4-(3 -chlorophenyl)- l-methyl-2(lH)-quinolinone; 6-[(4-chlorophenyl)hydroxy(l-methyl-lH-imidazol-5-yl)methyl]-4-(3-ethoxyphenyl)- l-methyl-2(lH)-quinolinone; 6-[(4-chlorophenyl)(l-methyl-lH-imidazol-5-yl)methyl]-4-(3-ethoxyphenyl)-l-methyl- 2(lH)-quinolinone monohydrochloride.monohydrate; 6-[amino(4-chlorophenyl)(l-methyl-lH-imidazol-5-yl)methyl]-4-(3-ethoxyphenyl)-l- methyl-2(lH)-quinolinone, 6-amino(4-chlorophenyl)(l-methyl-lH-imidazol-5-yl)methyl]-l-methyl-4-(3- propylphenyl)-2(lH)-quinolinone; a stereoisomeric form thereof or a pharmaceutically acceptable acid or base addition salt; and (+)-6-[amino(4-chlorophenyl)(l-methyl-lH-imidazol-5-yl)methyl]-4-(3-chlorophenyl)- l-methyl-2(lH)-quinolinone (Compound 75 in Table 1 of the Experimental part of WO-97/21701) ; or a pharmaceutically acceptable acid addition salt thereof. The latter compound is especially preferred. Further preferred embodiments of the present invention include compounds of formula (IX) wherein one or more of the following restrictions apply: • =X'-X 2 -X 3 is a trivalent radical of formula (x-1), (x-2), (x-3), (x-4) or (x-9) wherein each R 6 independently is hydrogen, Cι_ alkyl, Cι_ alkyloxycarbonyl, amino or aryl and R 7 is hydrogen; • >Y'-Y 2 - is a trivalent radical of formula (y-1), (y-2), (y-3), or (y-4) wherein each R 9 independently is hydrogen, halo, carboxyl, Cι- 4 alkyl or Cι- 4 alkyloxycarbonyl; • r is 0, 1 or 2; • s is 0 or 1; • t is O; • R 1 is halo, Cι. 6 alkyl or two R 1 substituents ortho to one another on the phenyl ring may independently form together a bivalent radical of formula (a-1); • R 2 is halo; • R 3 is halo or a radical of formula (b-1) or (b-3) wherein R 10 is hydrogen or a radical of formula -Alk-OR 13 . R 11 is hydrogen; R 12 is hydrogen, Cj_ 6 alkyl, Cι_ 6 alkylcarbonyl, hydroxy, Cι- 6 alkyloxy or mono- or di(Cι_ 6 alkyl)aminoCι_ 6 alkylcarbonyl; Alk is Cι- 6 alkanediyl and R 13 is hydrogen; • R 4 is a radical of formula (c-l) or (c-2) wherein R 16 is hydrogen, halo or mono- or di(Cι- 4 alkyl)amino; R 17 is hydrogen or Cι_ 6 alkyl; • aryl is phenyl. A particular group of compounds consists of those compounds of formula (IX) wherein =X ] -X 2 -X 3 is a trivalent radical of formula (x-1), (x-2), (x-3), (x-4) or (x-9), >Y1-Y2 is a trivalent radical of formula (y-2), (y-3) or (y-4), r is 0 or 1, s is 1, t is 0, R 1 is halo, C ( ι- 4) alkyl or forms a bivalent radical of formula (a-1), R 2 is halo or C]. 4 alkyl, R 3 is hydrogen or a radical of formula (b-1) or (b-3), R is a radical of formula (c-l) or (c-2), R 6 is hydrogen, Cι- 4 alkyl or phenyl, R 7 is hydrogen, R 9 is hydrogen or Cι_ alkyl, R 10 is hydrogen or -Alk-OR , R is hydrogen and R is hydrogen or Cι- 6 alkylcarbonyl and R 13 is hydrogen; Preferred compounds are those compounds of formula (IX) wherein =X'-X 2 -X 3 is a trivalent radical of formula (x-1) or (x-4), >Y1-Y2 is a trivalent radical of formula (y- 4), r is 0 or 1, s is 1, t is 0, R 1 is halo, preferably chloro and most preferably 3-chloro, R is halo, preferably 4-chloro or 4-fluoro, R is hydrogen or a radical of formula (b-1) or (b-3), R 4 is a radical of formula (c-l) or (c-2), R 6 is hydrogen, R 7 is hydrogen, R 9 is hydrogen, R 10 is hydrogen, R 11 is hydrogen and R 12 is hydrogen; Other preferred compounds are those compounds of formula (IX) wherein =X ] -X 2 -X 3 is a trivalent radical of formula (x-2), (x-3) or (x-4), >Y1-Y2 is a trivalent radical of formula (y-2), (y-3) or (y-4), r and s are 1, t is 0, R 1 is halo, preferably chloro, and most preferably 3-chloro or R 1 is d- alkyl, preferably 3-methyl, R 2 is halo, preferably chloro, and most preferably 4-chloro, R 3 is a radical of formula (b-1) or (b-3), R 4 is a radical of formula (c-2), R 6 is Cι- 4 alkyl, R 9 is hydrogen, R 10 and R 11 are hydrogen and R 12 is hydrogen or hydroxy. The most preferred compounds of formula (IX) are 7-[(4-fluorophenyl)(lH-imidazol-l-yl)methyl]-5-phenylimidazo[l,2-a]quinoline; α-(4-chlorophenyl)- -(l-methyl-lH-imidazol-5-yl)-5-phenylimidazo[l,2-a]quinoline- 7-methanol; 5-(3-chlorophenyl)- -(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5-yl)-imidazo[l,2- a]quinoline-7-methanol; 5-(3-chlorophenyl)-α-(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5-yl)imidazo[l,2- a]quinoline-7-methanamine; 5-(3-chlorophenyl)-α-(4-chlorophenyl)-α-(l -methyl- lH-imidazol-5-yl)tetrazolo[ 1,5- a]quinoline-7-methanamine; 5-(3-chlorophenyl)-α-(4-chlorophenyl)-l-methyl-α-(l -methyl- lH-imidazol-5-yl)- 1,2,4- triazolo[4,3-a]quinoline-7-methanol; 5-(3-chlorophenyl)-α-(4-chlorophenyl)- -(l-methyl-lH-imidazol-5-yl)tetrazolo[l,5- a]quinoline-7-methanamine; 5-(3-chlorophenyl)-α-(4-chlorophenyl)- -(l-methyl-lH-imidazol-5-yl)tetrazolo[l,5- a]quinazoline-7-methanol; 5-(3-chlorophenyl)-α-(4-chlorophenyl)-4,5-dihydro-α-(l-methyl-lH-imidazol-5- yl)tetrazolo[l,5-a]quinazoline-7-methanol; 5-(3-chlorophenyl)-α-(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5-yl)tetrazolo[l,5- a]quinazoline-7-methanamine; 5-(3-chlorophenyl)-α-(4-chlorophenyl)-N-hydroxy-α-(l-methyl-lH-imidazol-5- yl)tetrahydro[l,5-a]quinoline-7-methanamine; -(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5-yl)-5-(3-methylphenyl)tetrazolo[l,5- a]quinoline-7-methanamine; the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof. 5-(3-chlorophenyl)-α-(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5-yl)tetrazolo[l,5- a]quinazoline-7-methanamine, especially the (-) enantiomer, and its pharmaceutically acceptable acid addition salts are especially preferred. As used in the foregoing definitions and hereinafter halo defines fluoro, chloro, bromo and iodo; Ci -6alkyl defines straight and branched chained saturated hydrocarbon radicals having from 1 to 6 carbon atoms such as, for example, methyl, ethyl, propyl, butyl, pentyl, hexyl and the like; Ci -8alkyl encompasses the straight and branched chained saturated hydrocarbon radicals as defined in Ci -6alkyl as well as the higher homologues thereof containing 7 or 8 carbon atoms such as, for example heptyl or octyl; Ci-i2alkyl again encompasses Ci -δalkyl and the higher homologues thereof containing 9 to 12 carbon atoms, such as, for example, nonyl, decyl, undecyl, dodecyl; Ci -l 6alkyl again encompasses Ci -I2alkyl and the higher homologues thereof containing 13 to 16 carbon atoms, such as, for example, tridecyl, tetradecyl, pentedecyl and hexadecyl; C2-6 lkenyl defines straight and branched chain hydrocarbon radicals containing one double bond and having from 2 to 6 carbon atoms such as, for example, ethenyl, 2-propenyl, 3-butenyl, 2-pentenyl, 3-pentenyl, 3-methyl-2-butenyl, and the like; Ci -6alkanediyl defines bivalent straight and branched chained saturated hydrocarbon radicals having from 1 to 6 carbon atoms, such as, for example, methylene, 1,2-ethanediyl, 1,3-propanediyl, 1,4-butanediyl, 1,5-pentanediyl, 1,6-hexanediyl and the branched isomers thereof. The term "C(=O)" refers to a carbonyl group, "S(O)" refers to a sulfoxide and "S(O)2" to a sulfon. The term "natural amino acid" refers to a natural amino acid that is bound via a covalent amide linkage formed by loss of a molecule of water between the carboxyl group of the amino acid and the amino group of the remainder of the molecule. Examples of natural amino acids are glycine, alanine, valine, leucine, isoleucine, methionine, proline, phenylanaline, tryptophan, serine, threonine, cysteine, tyrosine, asparagine, glutamine, aspartic acid, glutamic acid, lysine, arginine, histidine. The pharmaceutically acceptable acid or base addition salts as mentioned hereinabove are meant to comprise the therapeutically active non-toxic acid and non-toxic base addition salt forms which the compounds of formulas (I), (II), (El), (IV), (V), (VI), (VH), (Vffl) or (IX) are able to form. The compounds of formulas (I), (II), (El), (IV), (V), (VI), (VII), (VET) or (IX) which have basic properties can be converted in their pharmaceutically acceptable acid addition salts by treating said base form with an appropriate acid. Appropriate acids comprise, for example, inorganic acids such as hydrohalic acids, e.g. hydrochloric or hydrobromic acid; sulfuric; nitric; phosphoric and the like acids; or organic acids such as, for example, acetic, propanoic, hydroxy acetic, lactic, pyruvic, oxalic, malonic, succinic (i.e. butanedioic acid), maleic, fumaric, malic, tartaric, citric, methanesulfonic, ethanesulfonic, benzenesulfonic, p-toluenesulfonic, cyclamic, salicylic, p-aminosalicylic, pamoic and the like acids. The compounds of formulae (I), (TT), (LU), (IV), (V), (VI), (VII), (Vffl) or (IX) which have acidic properties may be converted in their pharmaceutically acceptable base addition salts by treating said acid form with a suitable organic or inorganic base. Appropriate base salt forms comprise, for example, the ammonium salts, the alkali and earth alkaline metal salts, e.g. the lithium, sodium, potassium, magnesium, calcium salts and the like, salts with organic bases, e.g. the benzathine, N-methyl-D-glucamine, hydrabamine salts, and salts with amino acids such as, for example, arginine, lysine and the like. The terms acid or base addition salt also comprise the hydrates and the solvent addition forms which the compounds of formulae (I), (II), (m), (IV), (V), (VI), (VH), (Vm) or (IX) are able to form. Examples of such forms are e.g. hydrates, alcoholates and the like. The term stereochemically isomeric forms of compounds of formulae (I), (II), (El), (IV), (V), (VI), (VE), (VIE) or (IX), as used hereinbefore, defines all possible compounds made up of the same atoms bonded by the same sequence of bonds but having different three-dimensional structures which are not interchangeable, which the compounds of formulae (I), (E), (El), (IV), (V), (VI), (VE), (VEI) or (IX) may possess. Unless otherwise mentioned or indicated, the chemical designation of a compound encompasses the mixture of all possible stereochemically isomeric forms which said compound may possess. Said mixture may contain all diastereomers and/or enantiomers of the basic molecular structure of said compound. All stereochemically isomeric forms of the compounds of formulae (I), (E), (El), (IV), (V), (VI), (VE), (VIE) or (IX) both in pure form or in admixture with each other are intended to be embraced within the scope of the present invention. Some of the compounds of formulae (I), (E), (LU), (IV), (V), (VI), (VE), (VEI) or (IX) may also exist in their tautomeric forms. Such forms although not explicitly indicated in the above formula are intended to be included within the scope of the present invention. Whenever used hereinafter, the term "compounds of formulae (I), (E), (El), (IV), (V), (VI), (VE), (VEI) or (IX)" is meant to include also the pharmaceutically acceptable acid or base addition salts and all stereoisomeric forms. Examples of further farnesyl protein transferase inhibitors which may be used in combinations according to the invention include those referred to above, namely Arglabin (i.e.l(R)-10-epoxy-5(S),7(S)-guaia-3(4),l l(13)-dien-6,12-olide descibed in WO-98/28303 (NuOncology Labs); perrilyl alcohol described in WO-99/45912 (Wisconsin Genetics); SCH-66336, i.e. (+)-(R)-4-[2-[4-(3,10-dibromo-8-chloro-5,6- dihydro-l lH-benzo[5,6]cyclohepta[l,2-b]pyridin-l l-yl)piperidin-l-yl]-2- oxoethyl]piperidine-l-carboxamide, described in U.S. Patent No. 5874442 (Schering); L778123, i.e. l-(3-chlorophenyl)-4-[l-(4-cyanobenzyl)-5-imidazolylmethyl]-2- piperazinone, described in WO-00/01691 (Merck); compound 2(S)-[2(S)-[2(R)-amino- 3-mercapto]propylamino-3(S)-methyl]-pentyloxy-3-phenylpropionyl-methionine sulfone described in WO-94/10138 (Merck); and BMS 214662, i.e. (R)-2,3,4,5- tetrahydro-l-(ET-imidazol-4-ylmethyl)-3-(phenylmethyl)-4-(2-thienylsulphonyl)-lH- l,4-benzodiazapine-7-carbonitrile, described in WO 97/30992 (Bristol Myers Squibb) and Pfizer compounds (A) and (B) described in WO-00/12498 and WO-00/12499: (A) (B) These inhibitors may be prepared in conventional manner for example as described in the above specifications or by processes analogous thereto. The present invention also relates to combinations according to the invention for use in medical therapy for example for inhibiting the growth of tumor cells. The present invention also relates to the use of combinations according to the invention for the preparation of a pharmaceutical composition for inhibiting the growth of tumor cells. The present invention also relates to a method of inhibiting the growth of tumor cells in a human subject which comprises administering to the subject an effective amount of a combination according to the invention. This invention further provides a method for inhibiting the abnormal growth of cells, including transformed cells, by administering an effective amount of a combination according to the invention. Abnormal growth of cells refers to cell growth independent of normal regulatory mechanisms (e.g. loss of contact inhibition). This includes the abnormal growth of : (1) tumor cells (tumors) expressing an activated ras oncogene; (2) tumor cells in which the ras protein is activated as a result of oncogenic mutation of another gene; (3) benign and malignant cells of other proliferative diseases in which aberrant ras activation occurs. Furthermore, it has been suggested in literature that ras oncogenes not only contribute to the growth of of tumors in vivo by a direct effect on tumor cell growth but also indirectly, i.e. by facilitating tumor-induced angiogenesis (Rak. J. et al, Cancer Research, 55, 4575-4580, 1995). Hence, pharmacologically targetting mutant ras oncogenes could conceivably suppress solid tumor growth in vivo, in part, by inhibiting tumor-induced angiogenesis. This invention also provides a method for inhibiting tumor growth by administering an effective amount of a combination according to the present invention, to a subject, e.g. a mammal (and more particularly a human) in need of such treatment. In particular, this invention provides a method for inhibiting the growth of tumors expressing an activated ras oncogene by the administration of an effective amount of combination according to the present invention. Examples of tumors which may be inhibited include, but are not limited to, lung cancer (e.g. adenocarcinoma and including non- small cell lung cancer), pancreatic cancers (e.g. pancreatic carcinoma such as, for example exocrine pancreatic carcinoma), colon cancers (e.g. colorectal carcinomas, such as, for example, colon adenocarcinoma and colon adenoma), hematopoietic tumors of lymphoid lineage (e.g. acute lymphocytic leukemia, B-cell lymphoma, Burkitt's lymphoma), myeloid leukemias (for example, acute myelogenous leukemia (AML)), thyroid follicular cancer, myelodysplastic syndrome (MDS), tumors of mesenchymal origin (e.g. fibrosarcomas and rhabdomyosarcomas), melanomas, teratocarcinomas, neuroblastomas, gliomas, benign tumor of the skin (e.g. keratoacanthomas), breast carcinoma (e.g. advanced breast cancer), kidney carninoma, ovary carcinoma, bladder carcinoma and epidermal carcinoma. This invention also provides a method for inhibiting proliferative diseases, both benign and malignant, wherein ras proteins are aberrantly activated as a result of oncogenic mutation in genes, i.e. the ras gene itself is not activated by mutation to an oncogenic mutation to an oncogenic form, with said inhibition being accomplished by the administration of an effective amount of a combination according to the invention, to a subject in need of such a treatment. For example, the benign proliferative disorder neurofibromatosis, or tumors in which ras is activated due to mutation or overexpression of tyrosine kinase oncogenes may be inhibited by the combinations according to the invention. The farnesyl transferase inhibitor of formula (I) and the further inhibitor may be administered simultaneously (e.g. in separate or unitary compositions) or sequentially in either order. In the latter case, the two compounds will be administered within a period and in an amount and manner that is sufficient to ensure that an advantageous or synergistic effect is achieved. It will be appreciated that the preferred method and order of administration and the respective dosage amounts and regimes for each component of the combination will depend on the particular farnesyl transferase inhibitors being administered, their route of administration, the particular tumor being treated and the particular host being treated. The optimum method and order of administration and the dosage amounts and regime can be readily determined by those skilled in the art using conventional methods and in view of the information set out herein. The farnesyl transferase inhibitor is advantageously administered in an effective amount of from 0.0001 mg/kg to 100 mg/kg body weight, and in particular from 0.001 mg/kg to 10 mg/kg body weight. More particularly, for an adult patient, the dosage is conveniently in the range of 50 to 500mg bid, advantageously 100 to 400 mg bid and particularly 300mg bid. These dosages may be administered for example once, twice or more per course of treatment, which may be repeated for example every 14-28 days. With regard to the further farnesyl transferase inhibitor, suitable dosages for the compounds Arglabin (WO98/28303), perrilyl alcohol (WO 99/45712), SCH-66336 (US 5,874,442), L778123 (WO 00/01691), 2(S)-[2(S)-[2(R)-amino-3-mercapto]- propylamino-3(S)-methyl]-pentyloxy-3-phenylpropionyl-methionine sulfone (WO94/10138), BMS 214662 (WO 97/30992), Pfizer compounds A and B (WO 00/12499 and WO 00/12498) are given in the aforementioned patent specifications which are incoφorated herein by reference or are known to or can be readily determined by a person skilled in the art. In relation to perrilyl alcohol, the medicament may be administered l-4g per day per 1501b human patient. Preferably, 1-2 g per day per 1501b human patient. SCH-66336 typically may be administered in a unit dose of about 0.1 mg to 100 mg, more preferably from about 1 mg to 300 mg according to the particular application. Compounds L778123 and 2(S)-[2(S)-[2(R)-amino-3-mercapto]propylamino-3(S)-methyl]-pentyloxy- 3-phenylpropionyl-methionine sulfone may be administered to a human patient in an amount between about 0.1 mg/kg of body weight to about 20 mg/kg of body weight per day, preferably between 0.5 mg/kg of bodyweight to about 10 mg/kg of body weight per day. Pfizer compounds A and B may be administered in dosages ranging from about 1.0 mg up to about 500 mg per day, preferably from about 1 to about 100 mg per day in single or divided (i.e. multiple) doses. Therapeutic compounds will ordinarly be administered in daily dosages ranging from about 0.01 to about 10 mg per kg body weight per day, in single or divided doses. BMS 214662 may be administered in a dosage range of about 0.05 to 200 mg/kg/day, preferably less than 100 mg/kg/day in a single dose or in 2 to 4 divided doses. In view of their useful pharmacological properties, the components of the combinations according to the invention, may be formulated into various pharmaceutical forms for administration puφoses. The components may formulated separately in individual pharmaceutical compositions or in a unitary pharmaceutical composition containing both components. Farnesyl protein transferase inhibitors can be prepared and formulated into pharmaceutica] compositions by methods known in the art and in particular according to the methods described in the published patent specifications mentioned herein and incoφorated by reference; for the compounds of formulae (I), (E) and (El) suitable examples can be found in WO-97/21701. Compounds of formulae (TV), (V), and (VI) can be prepared and formulated using methods described in WO 97/16443, compounds of formulae (VE) and (VEI) according to methods described in WO 98/40383 and WO 98/49157 and compounds of formula (IX) according to methods described in WO 00/39082 respectively. The present invention therefore also relates to a pharmaceutical composition comprising a farnesyl tranferase inhibitor of formula (I) and one or more further farnesyl tranferase inhibitors together with one or more pharmaceutical carriers. To prepare pharmaceutical compositions for use in accordance with the invention, an effective amount of a particular compound, in base or acid addition salt form, as the active ingredient is combined in intimate admixture with a pharmaceutically acceptable carrier, which carrier may take a wide variety of forms depending on the form of preparation desired for administration. These pharmaceutical compositions are desirably in unitary dosage form suitable, preferably, for administration orally, rectally, percutaneously, or by parenteral injection. For example, in preparing the compositions in oral dosage form, any of the usual pharmaceutical media may be employed, such as, for example, water, glycols, oils, alcohols and the like in the case of oral liquid preparations such as suspensions, syrups, elixirs and solutions; or solid carriers such as starches, sugars, kaolin, lubricants, binders, disintegrating agents and the like in the case of powders, pills, capsules and tablets. Because of their ease in administration, tablets and capsules represent the most advantageous oral dosage unit form, in which case solid pharmaceutical carriers are obviously employed. For parenteral compositions, the carrier will usually comprise sterile water, at least in large part, though other ingredients, to aid solubility for example, may be included. Injectable solutions, for example, may be prepared in which the carrier comprises saline solution, glucose solution or a mixture of saline and glucose solution. Injectable suspensions may also be prepared in which case appropriate liquid carriers, suspending agents and the like may be employed. In the compositions suitable for percutaneous administration, the carrier optionally comprises a penetration enhancing agent and/or a suitable wetting agent, optionally combined with suitable additives of any nature in minor proportions, which additives do not cause a significant deleterious effect to the skin. Said additives may facilitate the administration to the skin and/or may be helpful for preparing the desired compositions. These compositions may be administered in various ways, e.g., as a transdermal patch, as a spot-on, as an ointment. It is especially advantageous to formulate the aforementioned pharmaceutical compositions in dosage unit form for ease of administration and uniformity of dosage. Dosage unit form as used in the specification and claims herein refers to physically discrete units suitable as unitary dosages, each unit containing a predetermined quantity of active ingredient calculated to produce the desired therapeutic effect in association with the required pharmaceutical carrier. Examples of such dosage unit forms are tablets (including scored or coated tablets), capsules, pills, powder packets, wafers, injectable solutions or suspensions, teaspoonfuls, tablespoonfuls and the like, and segregated multiples thereof. It may be appropriate to administer the required dose of each component of the combination as two, three, four or more sub-doses at appropriate intervals throughout the course of treatment. Said sub-doses may be formulated as unit dosage forms, for example, in each case containing independently 0.01 to 500 mg, for example 0.1 to 200 mg and in particular 1 to lOOmg of each active ingredient per unit dosage form. Experimental Testing of Combinations for Inhibition of Tumor Growth The combinations according to the invention may be tested for their efficacy in inhibiting tumor growth using conventional assays described in the literature for example the HTB177 lung carcinoma described by Liu M et al, Cancer Research, Vol. 58, No.21, 1 November 1998, pages 4947-4956, and the anti-mitotic assay described by Moasser M et al, Proc. Natl. Acad. Sci. USA, Vol. 95, pages 1369-1374, February 1998. Other in vitro and in vivo models for determining ant-tumor effects of combinations and possible synergy of the combinations according to the invention are described in WO 98/54966 and WO 98/32114. Clinical models for determining the efficacy and possible synergism for combination therapy in the clinic are generally described in Cancer: Principles and Practice of Oncology, Fifth Edition, edited by Vincent T DeVita, Jr., Samuel Hellman, Steven A. Rosenberg, Lippincott-Raven, Philadelphia, 1997, especially Chapter 17, pages 342-346.

Claims: Claims 1. A combination of a farnesyl transferase inhibitor selected from compounds of formulae (I), (E), (El), (IV), (V), (VI), (VE), (VEI) and (IX) below: (I) (ID W> the pharmaceutically acceptable acid or base addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; R 1 is hydrogen, Cι_i2alkyl, Ar 1 , Ar 2 Ci _6alkyl, quinolinylCι _6alkyl, pyridylCi-6alkyl, hydroxyCi-βalkyl, Cι _-6alkyloxyCi -6alkyl, mono- or di(C i -6alkyl)aminoC i -6alkyl , aminoC i -6alkyl , or a radical of formula -Alk 1 -C(=O)-R 9 , -Alki-S(O)-R 9 or -Alk 1 -S(O)2-R 9 , wherein Alk 1 is Ci -6alkanediyl, R 9 is hydroxy, Ci-6alkyl, Cι_6alkyloxy, amino, Ci_8alkylamino or Cι_8alkylamino substituted with Ci -6alkyloxycarbonyl; R 2 , R 3 and R ^ each independently are hydrogen, hydroxy, halo, cyano, Ci -6alkyl, Ci-6alkyloxy, hydroxyCi-6 a lkyloxy, Ci-6alkyloxyCι_6alkyloxy, aminoCi-6alkyl- oxy, mono- or di(Ci-6alkyl)aminoCi -6alkyloxy, Ar 1 , Ar 2 Cι_6alkyl, Ar 2 oxy, Ar 2 Ci-6alkyloxy, hydroxycarbonyl, Ci-6alkyloxycarbonyl, trihalomethyl, trihalomethoxy, C2-6 al kenyl, 4,4-dιmethyloxazolyl; or when on adjacent positions R 2 and R 3 taken together may form a bivalent radical of formula -O-CH2-O- (a-1), -O-CH2-CH2-O- (a-2), -O-CH=CH- (a-3), -O-CH2-CH2- (a-4), -O-CH2-CH2-CH2- (a-5), or -CH=CH-CH=CH- (a-6); R 4 and R^ each independently are hydrogen, halo, Ar 1 , Ci -6alkyl, hydroxyCi-6alkyl, Ci-6alkyloxyCi-6alkyl, Ci-6alkyloxy, Ci -6alkylthio, amino, hydroxycarbonyl, Ci -6 a ιkyloxycarbonyl, Ci-6alkylS(O)Ci -6alkyl or Ci-6alkylS(O)2Ci -6alkyl; R6 and R7 each independently are hydrogen, halo, cyano, Ci -.βalkyl, Cι_6alkyloxy, Ar 2 oxy, trihalomethyl, Ci -6alkylthio, di(Ci -6alkyl)amino, or when on adjacent positions R" and R ' taken together may form a bivalent radical of formula -O-CH2-O- (c-l), or -CH=CH-CH=CH- (c-2); R 8 is hydrogen, Cι_6alkyl, cyano, hydroxycarbonyl, Ci .βalkyloxycarbonyl, C 1 -6alkylcarbonylC 1 -όalkyl, cyanoC 1 -όalkyl, C 1 _6alkyloxycarbonylC 1 _6alkyl, carboxyCι_6alkyl, hydroxyCi-6alkyl, aminoCi -όalkyl, mono- or di(Ci-6alkyl)- aminoCi-6alkyl, imidazolyl, haloCi -6alkyl, Ci -6alkyloxyCi -6alkyl, aminocarbonylCi-6alkyl, or a radical of formula -O-RlO (b-1), .S.RIO (b-2), -N-R n R 12 ( b -3)' wherein R 1 ^ is hydrogen, Ci -6alkyl, Ci-6alkylcarbonyl, Ar 1 , Ar 2 Cι_6alkyl, Ci -6alkyloxycarbonylCi-6alkyl, or a radical or formula -Alk 2 -OR 13 or -Alk 2 -NR 14 R 15 ; R 1 ! is hydrogen, Cι_i2alkyl, Ar 1 or Ar 2 Cι-,6alkyl; R 12 is hydrogen, Ci -6alkyl, Cι_i6alkylcarbonyl, Ci-6 al kyloxycarbonyl, Ci-6 a lkylaminocarbonyl, Ar 1 , Ar 2 Cι _6 a lkyl, Cι_6alkylcarbonyl- Ci-6alkyl, a natural amino acid, A^carbonyl, Ar 2 Ci-6alkylcarbonyl, aminocarbonylcarbonyl, Cι_6alkyloxyCi-6alkylcarbonyl, hydroxy, Ci-6 al kyloxy, aminocarbonyl, di(Ci-6alkyl)aminoCι_6alkylcarbonyl, amino, Ci-6alkylamino, Cι_6alkylcarbonylamino, or a radical or formula -Alk 2 -OR 13 or -Alk 2 -NR 14 Ri5 ; wherein Alk 2 is Ci -6alkanediyl; R 13 is hydrogen, Cι_6alkyl, Ci-6alkylcarbonyl, hydroxy- Ci-6alkyl, Ar 1 or Ar 2 Ci-6alkyl; R 14 is hydrogen, Ci-6alkyl, Ar 1 or Ar 2 Cι -6alkyl; R 1 ^ is hydrogen, Ci-βalkyl, Ci-βalkylcarbonyl, Ar 1 or Ar 2 Ci-6alkyl; R 1 ^ is hydrogen, halo, cyano, Ci -6alkyl, Ci-βalkyloxycarbonyl, Ar 1 ; R 18 is hydrogen, C i _6alky], Cι_6alkyloxy or halo; R 19 is hydrogen or C i _6alkyl ; Ar 1 is phenyl or phenyl substituted with Cι_6alkyl, hydroxy, amino, Cι_6alkyloxy or halo; and Ar 2 is phenyl or phenyl substituted with Ci -6alkyl, hydroxy, amino, Cι-.6alkyloxy or halo. (IV) (V) (VI) the pharmaceutically acceptable acid or base addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; R 1 is hydrogen, Ci -I2alkyl, Ar 1 , Ar 2 Ci -6alkyl, quinolinylCι_6alkyl, pyridyl- Ci ._6alkyl, hydroxyCi-6 a lkyl, Ci-6alkyloxyCi-6alkyl, mono- or di(Cι_6alkyl)- aminoCi-6 a lkyl, aminoCi-6 al kyl, or a radical of formula -Alk 1 -C(=O)-R 9 , -Alk!-S(O)-R 9 or -Alk 1 -S(O)2-R 9 , wherein Alk 1 is Ci-6alkanediyl, R 9 is hydroxy, Cι_6alkyl, Ci-βalkyloxy, amino, Ci -8alkylamino or Ci-8alkylamino substituted with Ci -βalkyloxycarbonyl; R 2 and R 3 each independently are hydrogen, hydroxy, halo, cyano, Cι_6alkyl, Ci-6alkyloxy, hydroxyCi -6alkyloxy, Ci -6aιkyloxyCi -6alkyloxy, amino- Cι _6alkyloxy, mono- or di(Ci-6alkyl)aminoCi -6arkyloxy, Ar 1 , Ar 2 Ci-6alkyl, Ar 2 oxy, Ar 2 Ci-6alkyloxy, hydroxycarbonyl, Ci -6alkyloxycarbonyl, trihalomethyl, trihalomethoxy, C2-6 a lkenyl; or when on adjacent positions R2 and R 3 taken together may form a bivalent radical of formula -O-CH2-O- (a-1), -O-CH2-CH2-O- (a-2), -O-CH=CH- (a-3), -O-CH2-CH2- (a-4), -O-CH2-CH2-CH2- (a-5), or -CH=CH-CH=CH- (a-6); R 4 and R 5 each independently are hydrogen, Ar 1 , d- 6 alkyl, d- 6 alkyloxyCι- 6 aιkyl, Cι- 6 alkyloxy, Cι- 6 alkylthio, amino, hydroxycarbonyl, Cι- 6 alkyloxycarbonyl, Cι- 6 alkylS(O)Cι- 6 alkyl or d- 6 alkylS(O) 2 d- 6 alkyl; R6 and R^ each independently are hydrogen, halo, cyano, Ci -.βalkyl, Ci-6alkyloxy or Ar 2 oxy; R^ is hydrogen, Cι_6alkyl, cyano, hydroxycarbonyl, Ci -6alkyloxycarbonyl, Cι_6alkyl- carbonylCi-6alkyl, cyanoCι_6alkyl, Ci-6alkyloxycarbonylCi-6alkyl, hydroxy- carbonylCi-6alkyl, hydroxyCi-6alkyl, aminoCi-6 al kyl, mono- or di(Cι -6alkyl)- aminoCi-6alkyl, haloCi-όalkyl, Ci -6alkyloxyCi -6alkyl, aminocarbonylCi-6alkyl, Ar 1 , Ar 2 Cι_6 al kyloxyCi-6 l kyl, Ci-6 a lkylthioCι_6 lkyl; R 1 ^ is hydrogen, Ci-6 a lkyl, Ci-6 a lkyloxy or halo; R 1 1 is hydrogen or Ci-6alkyl; Ar 1 is phenyl or phenyl substituted with Ci -6 al kyl, hydroxy, amino, Ci -6alkyloxy or halo; Ar 2 is phenyl or phenyl substituted with Ci -6alkyl,hydroxy,amino,Cι-,6alkyloxy or halo. the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; -A- is a bivalent radical of formula -CH=CH- (a-1), -CH2-S- (a-6), -CH2-CH2- (a-2), -CH2-CH2-S- (a-7), -CH2-CH2-CH2- (a-3), -CH=N- (a-8), -CH2-O- (a-4), -N=N- (a-9), or -CH2-CH2-O- (a-5), -CO-NH- (a-10); wherein optionally one hydrogen atom may be replaced by Ci -4alkyl or Ar 1 ; R 1 and R 2 each independently are hydrogen, hydroxy, halo, cyano, Ci-6alkyl, trihalomethyl, trihalomethoxy, C2-6 a lkenyl, Ci -6alkyloxy, hydroxyCi-6alkyloxy, Ci -6alkyloxyCi-6alkyloxy, Cι_6alkyloxycarbonyl, a inoCi-όalkyloxy, mono- or di(Ci -6 a kyl)aminoCi -6alkyloxy, Ar 2 , Ar 2 -Cι_6alkyl, Ar -oxy, Ar 2 -Cι_6alkyloxy; or when on adjacent positions R 1 and R 2 taken together may form a bivalent radical of formula -O-CH2-O- (b-1), -O-CH2-CH2-O- (b-2), -O-CH=CH- (b-3), -O-CH2-CH2- (b-4), -O-CH2-CH2-CH2- (b-5), or -CH=CH-CH=CH- (b-6); R 3 and R 4 each independently are hydrogen, halo, cyano, Ci -6alkyl, Ci -6alkyloxy, Ar 3 -oxy, Cι_6alkylthio, di(Ci-6alkyl)amino, trihalomethyl, trihalomethoxy, or when on adjacent positions R 3 and R 4 taken together may form a bivalent radical of formula -O-CH2-O- (c-l), -O-CH2-CH2-O- (c-2), or -CH=CH-CH=CH- (c-3); R5 is a radical of formula - (d-2), wherein R 13 is hydrogen, halo, Ar 4 , Cι_6alkyl, hydroxyCi-6alkyl, Ci -6alkyloxy- Cι_6alkyl, Ci -6alkyloxy, Ci -όalkylfhio, amino, Ci-6alkyloxy- carbonyl, Ci-6alkylS(O)Ci-6 a lkyl or Cι_6alkylS(O)2Ci-6alkyl; R 1 is hydrogen, Ci -6alkyl or di(Ci-4alkyl)aminosulfonyl; R6 is hydrogen, hydroxy, halo, Ci-6alkyl, cyano, haloCi -6alkyl, hydroxyCi-6 al kyl, cyanoCι_6alkyl, aminoCi -βalkyl, Ci -6alkyloxyCi-6alkyl, C i _6alkylthioC i _6alkyl , aminocarbonylC i _6alkyl, Ci -6alkyloxycarbonylCi-6alkyl, Ci-6alkylcarbonyl-Ci-6alkyl, Cι_6alkyloxycarbonyl, mono- or di(Cι -6alkyl)aminoCι -6alkyl, Ar^, Ar5-Ci-6alkyloxyCι_6alkyl; or a radical of formula -O-R7 (e-1), _ S _R7 (e-2), -N-RδR 9 (e-3), wherein R^ is hydrogen, Ci-6 a lkyl, Ci -6alkylcarbonyl, Ar^, Ar6-Ci -6alkyl, Ci-6alkyloxycarbonylCi-6alkyl, or a radical of formula -Alk-OR 10 or -Alk-NR n R 12 ; R8 is hydrogen, Ci-6alkyl, Ar 7 or Ar^-Ci -.6alkyl; R 9 is hydrogen, Ci -6alkyl, Ci-βalkylcarbonyl, Ci-6alkyloxycarbonyl, Ci--6alkylaminocarbonyl, Ar^, Ar8-Cι _6alkyl, Ci -βalkylcarbonyl- Cι_6alkyl, Ar^-carbonyl, Ar8-Cι _6alkylcarbonyl, aminocarbonyl- carbonyl, Ci-6alkyloxyCi-6alkylcarbonyl, hydroxy, Ci .βalkyloxy, aminocarbonyl, di(Ci -6alkyl)aminoCι _6alkylcarbonyl, amino, Ci _6alkylamino, Ci -6alkylcarbonylamino, or a radical or formula -Alk-OR 10 or -Alk-NR 1 X R 12 ; wherein Alk is Ci -6alkanediyl; R 10 is hydrogen, Cι_6alkyl, Ci _6alkylcarbonyl, hydroxyCi-6alkyl, Ar 9 or Ar 9 -Cι_6alkyl; R 1 is hydrogen, Ci _6alkyl, Ci _6alkylcarbonyl, Ar 10 or Ar 10 -Ci-6alkyl; R 12 is hydrogen, Ci-6alkyl, Ar 1 1 or Ar^-Ci-όalkyl; and Ar 1 to Ar 11 are each independently selected from phenyl; or phenyl substituted with halo, Ci -βalkyl, Ci .βalkyloxy or trifluoromethyl. the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof, wherein the dotted line represents an optional bond; X is oxygen or sulfur; R 1 and R 2 each independently are hydrogen, hydroxy, halo, cyano, Ci-βalkyl, trihalomethyl, trihalomethoxy, C2-6 al kenyl, Cι_6alkyloxy, hydroxyCi _6alkyloxy, Ci-6alkyloxyCi -6alkyloxy, Ci-6alkyloxycarbonyl, aminoCi-6alkyloxy, mono- or di(Ci-6alkyl)aminoCι -6alkyloxy, Ar 1 , A^Ci -6alkyl, Ar y or AriCi-όalkyloxy; R 3 and R 4 each independently are hydrogen, halo, cyano, Ci _6alkyl, Ci-βalkyloxy, Ar y, Ci-6alkylthio, di(Ci -6alkyl)amino, trihalomethyl or trihalomethoxy; R5 is hydrogen, halo, Ci-6alkyl, cyano, haloCι _6alkyl, hydroxyCi _6alkyl, cyanoCi-6 a lkyl, aminoCi -6alkyl, Ci-6alkyloxyCi-6alkyl, C i _6 a lkylthioC i -6 l kyl , aminocarbonylC i -6alkyl, Ci-.6alkyloxycarbonylCi_6alkyl, Ci-6alkylcarbonyl-Ci -6aikyl, Ci-6alkyloxycarbonyl, mono- or di(Cι _6alkyl)aminoCι -βalkyl, Ar 1 , A^Ci -6alkyloxyCι -βalkyl; or a radical of formula -O-R 10 (a- 1 ) ' _ S _ R 10 (a-2), . N .R1 1R12 (a-3), wherein R 10 is hydrogen, Ci -6alkyl, Ci-6alkylcarbonyl, Ar 1 , AriCi-όalkyl, Ci-6alkyloxycarbonylCι_6alkyl, or a radical of formula -Alk-OR 13 or -Alk-NR 14 R 15 ; R 1 1 is hydrogen, Cι_6alkyl, Ar 1 or A^Ci-όalkyl; R 12 is hydrogen, Cι_6alkyl, Cι_6alkylcarbonyl, Ci -6alkyloxycarbonyl, Ci-6alkylaminocarbonyl, Ar 1 , ArlCi -όalkyl, Ci -6alkylcarbonyl- Ci -6alkyl, A^carbonyl, ArlCι_6alkylcarbonyl, aminocarbonyl- carbonyl, Ci-6alkyloxyCi-6alkylcarbonyl, hydroxy, Ci -6alkyloxy, aminocarbonyl, di(Ci-6alkyl)aminoCι_6alkylcarbonyl, amino, C i _6alkylamino, C 1 -6alkylcarbonylamino, or a radical or formula -Alk-OR 13 or -Alk-NR 14 R 15 ; wherein Alk is Ci-galkanediyl; R 13 is hydrogen, Ci -6alkyl, Cι_6alkylcarbonyl, hydroxyCi -όalkyl, Ar 1 or R 14 is hydrogen, Ci-6alkyl, Ar 1 or AriCi-όalkyl; R 1 ^ is hydrogen, Ci-βalkyl, Ci-6alkylcarbonyl, Ar 1 or AriCi-όalkyl; R^ is a radical of formula - (b-2), wherein R^is hydrogen, halo, Ar 1 , Ci-6alkyl, hydroxyCi -6alkyl, Cι_6alkyloxy- Ci-6alkyl, Ci-6alkyloxy, Cι_6alkylthio, amino, C i _6alkyloxycarbonyl , C i _6alkylthioC i -6alkyl, Ci-6alkylS(O)Ci-6alkyl or Ci-6alkylS(O)2Ci-6alkyl; R^is hydrogen, Cι_6alkyl or di(Ci-4alkyl)aminosulfonyl; R7 is hydrogen or Ci-6alkyl provided that the dotted line does not represent a bond; R 8 is hydrogen, Cι_6alkyl or Ar 2 CH2 or Het 1 CH2; R 9 is hydrogen, Ci -όalkyl , Ci-6alkyloxy or halo; or R8 and R 9 taken together to form a bivalent radical of formula -CH=CH- (c-l), -CH2-CH2- (c-2), -CH2-CH2-CH2- (c-3), -CH2-O- (c-4), or -CH2-CH2-O- (c-5); Ar 1 is phenyl; or phenyl substituted with 1 or 2 substituents each independently selected from halo, Cι_6alkyl, Cι_6alkyloxy or trifluoromethyl; Ar 2 is phenyl; or phenyl substituted with 1 or 2 substituents each independently selected from halo, Cι_6alkyl, Cι_6alkyloxy or trifluoromethyl; and Het 1 is pyridinyl; pyridinyl substituted with 1 or 2 substituents each independently selected from halo, Ci-6 al kyl, Cι_6alkyloxy or trifluoromethyl and or the pharmaceutically acceptable acid addition salts and the stereochemically isomeric forms thereof, wherein =X ! -X 2 -X 3 - is a trivalent radical of formula =N-CR 6 =CR 7 - (x-1), =CR 6 -CR 7 =CR 8 - (x-6), =N-N=CR 6 - (χ- 2 ), =CR 6 -N=CR 7 - (x-7), =N-NH-C(=O)- (x-3), =CR 6 -NH-C(=O)- (x-8), or =N-N=N- (χ- 4 ), =CR 6 -N=N- (x-9); =N-CR°=N- (x-5), wherein each R 6 , R 7 and R 8 are independently hydrogen, Cι- 4 alkyl, hydroxy, Cι- 4 alkyloxy, aryloxy, hydroxyCi - 4 alkyl, Cι- 4 alkyloxyC]- alkyl, mono- or di(Cι- 4 alkyl)aminoC 1 - 4 alkyl, cyano, amino, thio, Cι- 4 alkylthio, arylthio or aryl; >γ 1 -.γ 2 . j s a trivalent radical of formula >CH-CHR 9 - (y-1), >C=N- (y-2), >CH-NR 9 - (y-3),or >C=CR 9 - (y-4); wherein each R 9 independently is hydrogen, halo, halocarbonyl, aminocarbonyl, hydroxyCi - 4 alkyl, cyano, carboxyl, Cι- alkyl, Cι- 4 alkyloxy, C 1 - 4 alkyloxyCι- 4 alkyl, Cι- alkyloxycarbonyl, mono- or di(Cι- alkyl)amino, mono- or di(Cι- 4 alkyl)aminoCι- 4 alkyl, aryl; r and s are each independently 0, 1, 2, 3, 4 or 5; t is O, 1, 2 or 3; each R 1 and R 2 are independently hydroxy, halo, cyano, Cι_6alkyl, trihalomethyl, trihalomethoxy, C 2 _ 6 alkenyl, Cι_ 6 alkyloxy, hydroxyCi - 6 alkyloxy, d- 6 alkylthio, Cι- 6 alkyloxyCι- 6 alkyloxy, Cι. 6 alkyloxycarbonyl, aminoC]- 6 alkyloxy, mono- or di(Cι. 6 alkyl)amino, mono- or di(C ] - 6 alkyl)aminoC 1 . 6 alkyloxy, aryl, aryld- 6 alkyl, aryloxy or arylCι- 6 alkyloxy, hydroxycarbonyl, Cι- 6 alkyloxycarbonyl, aminocarbonyl, aminoCi-ealkyl, mono- or di(C 1 . 6 alkyl)aminocarbonyl, mono- or di(C]- 6 alkyl)aminoCι_ 6 alkyl; or two R 1 or R 2 substituents adjacent to one another on the phenyl ring may independently form together a bivalent radical of formula -O-CH 2 -O- (a- 1 ) ' -O-CH 2 -CH 2 -O- (a-2), -O=CH=CH- (a-3), -O-CH 2 -CH 2 - (a-4), -O-CH 2 -CH 2 - CH 2 - (a-5), or -CH=CH-CH=CH- (a-6); R 3 is hydrogen, halo, Cι- 6 alkyl, cyano, haloCι- 6 alkyl, hydroxyCi - 6 alkyl, cyanoCι- 6 alkyl, aminoCι_ 6 alkyl, Cι- 6 alkyloxyCι_ 6 alkyl, Cι_ 6 alkylthioCι- 6 alkyl, aminocarbonylCι- 6 alkyl, hydroxycarbonyl, hydroxycarbonylCι- 6 alkyl, C i - 6 alkyloxycarbonylC i - 6 alkyl , C i - 6 alkylcarbonylC i - 6 alkyl, C i - alkyloxycarbonyl , aryl, arylCι- 6 alkyloxyCi-6 a lkyl, mono- or di(Cι- 6 alkyl)aminoCι_ 6 alkyl; or a radical of formula -O-R 10 (b-1), -S-R 10 (b-2), -NR n R 12 (b-3), wherein R 10 is hydrogen, Cι- 6 alkyl, Cι- 6 alkylcarbonyl, aryl, arylCi- 6 alkyl, Cι- 6 alkyloxycarbonylCι-6alkyl, or a radical of formula -Alk-OR 13 or -Alk-NR 1 R 15 ; R u is hydrogen , C i - 6 alkyl , aryl or arylC ι - 6 alkyl ; R 12 is hydrogen, Cι- 6 alkyl, aryl, hydroxy, amino, d- 6 alkyloxy, Cι- 6 alkylcarbonylCι- 6 alkyl, arylC]- 6 alkyl, Cι- 6 alkylcarbonylamino, mono- or di(d- 6 alkyl)amino, Cι- 6 alkylcarbonyl, aminocarbonyl, arylcarbonyl, haloCι- 6 alkylcarbonyl, arylCι- 6 alkylcarbonyl, Cι- 6 alkyloxycarbonyl, Cι- 6 alkyloxyCι_ 6 alkylcarbonyl, mono- or di(Cι- 6 alkyl)aminocarbonyl wherein the alkyl moiety may optionally be substituted by one or more substituents independently selected from aryl or Cι- 3 alkyloxycarbonyl, aminocarbonylcarbonyl, mono- or di(Cι- 6 alkyl)aminoC 1 - 6 alkylcarbonyl, or a radical or formula -Alk-OR 13 or -Alk-NR 14 R 15 ; wherein Alk is d- 6 alkanediyl; R 13 is hydrogen, Cι- 6 alkyl, Cι- 6 alkylcarbonyl, hydroxyCι- 6 alkyl, aryl or arylCι- 6 alkyl; R 14 is hydrogen, d- 6 alkyl, aryl or arylCι- 6 alkyl; R 15 is hydrogen, Cι-6alkyl, C]- 6 alkylcarbonyl, aryl or arylCι- 6 alkyl; R 4 is a radical of formula wherein R , 16 is hydrogen, halo, aryl, d. alkyl, hydroxyC]_ 6 alkyl, Cι- 6 a lkyloxyCι- 6 alkyl, Cι. 6 alkyloxy, Cι_ 6 alkylthio, amino, mono- or di(Cι_ alkyl)amino, hydroxycarbonyl, Cι- 6 alkyloxycarbonyl, C,- 6 alkylS(O)C,. 6 alkyl or C 1 - 6 alkylS(O) 2 Cι- 6 alkyl; R 16 may also be bound to one of the nitrogen atoms in the imidazole ring of formula (c-l) or (c-2), in which case the meaning of R 16 when bound to the nitrogen is limited to hydrogen, aryl, Cj- 6 alkyl, hydroxyCi - 6 alkyl, Cι_ 6 alkyloxyCι_ 6 alkyl, Cι- 6 alkyloxycarbonyl, Cι- 6 alkylS(O)Cι- 6 alkyl or Cι- 6 alkylS(O) 2 C 1 .6alkyl; R 17 is hydrogen, C]. 6 alkyl, Cι_ 6 alkyloxyCι. 6 alkyl, aryld_ 6 alkyl, trifluoromethyl or di(Cι_ 4 alkyl)aminosulfonyl; R 5 is Cι- 6 alkyl , d- ό alkyloxy or halo; aryl is phenyl, naphthalenyl or phenyl substituted with 1 or more substituents each independently selected from halo, Cι_ 6 alkyl, or trifluoromethyl; and a further farnesyl transferase inhibitor. 2. A combination as claimed in claim 1 wherein the first farnesyl protein transferase inhibitor is a compound of formula (I) wherein X is oxygen and the dotted line represents a bond. 3. A combination as claimed in claim 1 or claim 2 wherein the first farnesyl protein transferase inhibitor is a compound of formula (I) wherein R 1 is hydrogen, Ci-6alkyl, Ci-6 a lkyloxyCi-6 a lkyl or mono- or di(Ci-6alkyl)aminoCι_6 a lkyl and wherein R 3 is hydrogen and R 2 is halo, Ci-6alkyl, C2-6 a lkenyl, Ci-6alkyloxy, trihalomethoxy or hydroxyCi -6alkyloxy. 4. A combination as claimed in any of the preceding claims wherein the first farnesyl protein transferase inhibitor is a compound of formula (I) wherein R 8 is hydrogen, hydroxy, haloCi-6alkyl, hydroxyCι_6alkyl, cyanoCi-6alkyl, Cι-.6alkyloxycarbonylCi-6alkyl, imidazolyl, or a radical of formula -NR^R 12 wherein R 11 is hydrogen or Ci-i2alkyl and R 12 is hydrogen, Cι_6alkyl, Ci-6alkyloxy, Ci-6alkyloxyCi-6a]kylcarbonyl, hydroxy, or a radical of formula -Alk 2 -OR 13 wherein R 13 is hydrogen or Ci-βalkyl. 5. A combination as claimed in claim 1 wherein the first farnesyl transferase inhibitor is selected from: 4-(3-chlorophenyl)-6-[(4-chlorophenyl)hydroxy(l-methyl-lH-imidazol-5-yl)- methyl]-l-methyl-2(lH)-quinolinone, 6-[amino(4-chlorophenyl)-l-methyl-lH-imidazol-5-ylmethyl]-4-(3-chlorophenyl)- 1 -methyl-2( 1 H)-quinolinone; 6-[(4-chlorophenyl)hydroxy(l-methyl-lH-imidazol-5-yl)methyl]-4-(3-ethoxy- phenyl)-l-methyl-2(lH)-quinolinone; 6-[(4-chlorophenyl)(l-methyl-lH-imidazol-5-yl)methyl]-4-(3-ethoxyphenyl)-l- methyl-2(lH)-quinolinone monohydrochloride.monohydrate; 6-[amino(4-chlorophenyl)(l-methyl-lH-imidazol-5-yl)methyl]-4-(3-ethoxyphenyl)- l-methyl-2(lH)-quinolinone, and 6-amino(4-chlorophenyl)( 1 -methyl- lH-imidazol-5-yl)methyl]- 1 -methyl-4-(3- propylphenyl)-2(lH)-quinolinone; a stereoisomeric form thereof or a pharmaceutically acceptable acid or base addition salts thereof. 6. A combination as claimed in claim 1 wherein the first farnesyl transferase inhibitor i s (+)-6- [amino(4-chlorophenyl)( 1 -methyl- 1 H-imidazol-5-yl)methyl] -4- (3-chloro-phenyl)-l-methyl-2(lH)-quinolinone; or a pharmaceutically acceptable acid addition salt thereof. 7. A combination as claimed in claim 1 wherein the first farnesyl protein transferase inhibitor is a compound of formula (IX) wherein =X -X -X is a trivalent radical of formula (x-2), (x-3) or (x-4), >Y1-Y2 is a trivalent radical of formula (y-2), (y-3) or (y-4), r and s are 1, t is 0, R 1 is halo, preferably chloro, and most preferably 3- 1 chloro or R is Cι_ 4 alkyl, preferably 3-methyl, R is halo, preferably chloro, and most preferably 4-chloro, R 3 is a radical of formula (b-1) or (b-3), R 4 is a radical of formula (c-2), R 6 is Cι- 4 alkyl, R 9 is hydrogen, R 10 and R 11 are hydrogen and R 12 is hydrogen or hydroxy. 8. A combination as claimed in claim 1 wherein the first farnesyl protein transferase inhibitor is 5-(3-chlorophenyl)-α-(4-chlorophenyl)-α-(l-methyl-lH-imidazol-5- yl)tetrazolo[l,5-a]quinazoline-7-methanamine or a pharmaceutically acceptable acid addition salt thereof. 9. A combination as claimed in any of the preceding claims in the form of a pharmaceutical composition comprising a farnesyl transferase inhibitor selected from compounds of formulae (I), (E), (El), (IV), (V), (VI), (VE), (VEI) and (IX) (as defined in claim 1) and a further farnesyl transferase inhibitor, together with one or more pharmaceutical carriers. 10. A combination as claimed in any of the preceding claims for use in medical therapy. 11. A combination as claimed in claim 10 for inhibiting the growth of tumor cells. 12. Use of a combination as claimed in any of claims 1 to 11 in the manufacture of a pharmaceutical composition for inhibiting the growth of tumor cells. 13. A method of inhibiting the growth of tumor cells in a human subject which comprises administering to the subject an effective amount of a combination as claimed in any of claims 1 to 11.

Inventors: RYBAK MARY ELLEN MARGARET, RYBAK, MARY, ELLEN, MARGARET
Applicants: JANSSEN PHARMACEUTICA NV, RYBAK MARY ELLEN MARGARET, JANSSEN PHARMACEUTICA N.V., RYBAK, MARY, ELLEN, MARGARET
Application year: 2001
Main classification: A61K31
IPC codes: A61K31, A61K45, A61P35