Patent ID: 6861523

Claim:
A compound having a structure corresponding to that shown in Formula I, below, or a pharmaceutically acceptable salt thereof: wherein: X is O or NH; R 1 is selected from the group consisting of a hydrido, C 1 -C 10 alkyl, C 1 -C 10 substituted alkyl, C 7 -C 16 phenylalkyl, C 7 -C 16 substituted phenylalkyl, phenyl, substituted phenyl, C 3 -C 7 cycloalkyl, and a C 3 -C 7 substituted cycloalkyl group; R 2 is selected from the group consisting of a methyl, ethyl, isopropyl, n-propyl, butyl, t-butyl, cyclohexyl, n-octadecyl, phenyl, benzyl, 2-fluorophenyl, 3-fluorophenyl, 4-fluorophenyl, 2-chlorophenyl, 3-chlorophenyl, 4-chlorophenyl, 2-bromophenyl, 3-bromophenyl, 4-bromophenyl, 3-chloro-4-methylphenyl, 3-bromo-4-methylphenyl, 3-fluorosulfonylphenyl, 3,4-(methylenedioxy) phenyl, 4-phenoxyphenyl, trans-2-phenylcyclopropyl, 4-toluenesulfonyl, 2-tolyl, 3-tolyl, 4-tolyl, 2-methoxyphenyl, 3-methoxyphenyl, 4-methoxyphenyl, α,α,α-trifluoro-2-tolyl, α,α,α-trifluoro-3-tolyl, α,α,α-trifluoro-4-tolyl, 2,5-dimethylphenyl, 3,4-dimethylphenyl and a 3,5-dimethylphenyl substituent; and R 3 is selected from the group consisting of a hydrido, C 1 -C 6 alkyl, C 2 -C 6 alkenyl, benzyl, and a substituted benzyl substituent.