Patent ID: 7368571

Claim:
Acompound of formula (I), wherein: R 1 is hydrogen or —C(O)O-ethyl; R 2 is hydrogen, methyl, ethyl, propyl, vinyl, allyl, or benzyl, unsubstituted or substituted with one or more substituents independently selected from the group consisting of: halogens, —O—, OH, amino, and phenyl, unsubstituted or substituted with one or more substituents selected from the group consisting of: methyl, ethyl, phenyl, benzyl, 2-phenylethyl, 3-phenylallyl, and 2-phenylvinyl; R 3 is methyl, ethyl, butyl, or benzyl, unsubstituted or substituted with one or more substituents independently selected from the group consisting of: halogens, OH, methyl, cyclohexyl, —O—, thiadiazole, thiophenyl, and phenoxy, unsubstituted or substituted with one or more substituents independently selected from the group consisting of: halogens, phenyl, and ethoxy; R 4 is hydrogen, methyl or methoxymethyl; R 5 is hydrogen or methyl; R 6 is hydrogen, methyl, or benzyl; R 7 is hydrogen, methyl, benzyl, phenyl, allyl, or tert-butyl, unsubstituted or substituted with one or more halogens; X is C or N; Y is C; Z is C or N; and there is a double bond between X and the 6-membered ring and Z and the 6-membered ring; or between X and Y; or between Y and Z.