Patent ID: 7521427

Claim:
A compound of the formula: wherein, R 1 is selected from the group consisting of phenyl-O—CO— and phenyl-O—CO—AA 1 ; AA 1 , is an aliphatic amino acid with the L configuration, D configuration, or no chirality at the alpha-carbon, wherein AA 1 is selected from the group consisting of alanine, valine, leucine, isoleucine, norleucine, and norvaline, R 2 is C 1-10 alkyl substituted with phenyl; R 3 is selected independently from the group consisting of phenyl, phenyl monosubstituted with K, phenyl disubstituted with K, phenyl trisubstituted with K, C 1-10 alkyl with a phenyl group attached to the C 1-10 alkyl, C 1-10 alkyl with an attached phenyl group monosubstituted with K, C 1-10 alkyl with an attached phenyl group disubstituted with K, C 1-10 alkyl with an attached phenyl group trisubstituted with K, K is selected from the group consisting of halogen, C 1-10 alkyl, C 1-10 perfluoroalkyl, C 1-10 alkoxy, phenoxy, NO 2, CN, OH, CO 2 H, CONH 2, amino, C 1-10 alkylamino, C 2-12 dialkylamino, C 1-10 acyl, and C 1-10 alkoxy-CO—, and C 1-10 alkyl-S—; or a pharmaceutically acceptable salt, hydrate or solvate thereof.