Patent ID: 7538109

Claim:
A compound of formula (I) wherein: X is O; n is the integer 0; m is the integer 0, 1, 2, or 3; R 1 , R 2 , R 3 , R 4 represent hydrogen; R 5 represents hydrogen, C 1 -C 5 alkyl, —(CH 2 ) m —CO 2 -C 1 -C 5 alkyl, —(CH 2 ) m —CONH 2 , —(CH 2 ) m —CONH—C 1 -C 5 alkyl, or —CON—(C 1 -C 5 alkyl); R 6 represents hydrogen, or C 1 -C 5 alkyl; R 7 represents hydrogen; C 1 -C 5 alkyl; C 2 -C 5 alkenyl; or mono-, di- or tri-substituted phenyl or phenyl-C 1 -C 5 alkyl, whereby the substituents independently are C 1 -C 5 alkyl, C 1 -C 5 alkoxy, C 2 -C 5 alkenyl or halogen; —(CH 2 ) m —OH; —(CH 2 ) m —O—C 1 -C 5 alkyl; —(CH 2 ) m —CO 2 H; —(CH 2 ) m —CO 2 —C 1 -C 5 alkyl; —(CH 2 ) m —CONH 2 ; —(CH 2 ) m —CONH—C 1 -C 5 alkyl; or —CON—(C 1 -C 5 alkyl) 2 ; R 8 represents unsubstituted phenyl; or mono-, di- or tri-substituted phenyl, whereby the substituents independently are C 1 -C 5 alkyl, C 1 -C 5 alkoxy, trifluoromethyl, trifluoromethoxy, difluoromethoxy or halogen; and R 9 represents mono-, di- or tri-substituted phenyl whereby the substituents independently are C 1 -C 5 alkyl, C 1 -C 5 alkoxy, trifluoromethyl, trifluoromethoxy, difluoromethoxy or halogen; or an optically pure enantiomer, a mixture of enantiomers, a racemate, an optically pure diastereoisomer, a mixture of diastereoisomers, a diastereoisomeric racemate, a mixture of diastereoisomeric racemates, or a meso form, or a pharmaceutically acceptable salt thereof.