Patent ID: RE39682

Claim:
A compound of the formula: wherein R 1 represents farnesyl , geranyl or geranyl-geranyl; Z represents C—R 6 ; R 2 represents H, CN, the groups COOR 7 , SO 3 R 7 , CONR 7 R 8 , and SO 2 NR 7 R 8 , wherein R 7 and R 8 are each independently hydrogen, alkyl, alkenyl, and the groups COOM and SO 3 M, wherein M is a cation; R 3 , R 4 , R 5 and R 6 are each independently hydrogen, carboxyl, alkyl, alkenyl, aminoalkyl, nitro, halo, amino, mono- or di-alkylamino dialkylamino , or mercapto, alkylthio and wherein only one of R 3 , R 4 , R 5 and R 6 are other than hydrogen, alkyl, or halogen; X represents O, S, SO, SO 2 , or NH; and with the proviso that when R 1 is geranyl, X is O, R 2 is H and two of R 3 , R 4 and R 5 are each H, then the third one is not alkyl, alkythio or F; when R 1 is geranyl, X is SO 2 and R 2 and two of R 3 , R 4 and R 5 are each H then the third is not alkyl; and (a) when R 1 is farnesyl and either X is O and R 4 is NH or OH or X is S, SO, SO 2 SO 2 or NH and R 4 is OH and at least one of R 2 , R 3 and R 5 is different from hydrogen, alkyl or halogen ; and ( b ) when Z is CH, X is O and R 2 , R 3 and R 5 are hydrogen, then R 4 is not carboxyl .