Patent ID: 6992193

Claim:
A compound of Formula I: or a stereoisomer, prodrug, pharmaceutically acceptable salt, hydrate, solvate, acid salt hydrate, N-oxide or isomorphic crystalline form thereof; wherein, independently: n is an integer from 0 to 4; R 1 is H or —OH; R 2 is an optionally substituted alkyl or optionally substituted aryl; R 3 is H, optionally substituted alkyl, or, when taken together with R 2 , forms an optionally substituted 4-7 membered heterocycloalkyl ring; R 4 is H or optionally substituted alkyl; R 5 is optionally substituted alkyl, optionally substituted aryl or optionally substituted heteroaryl; and R 6 and R 7 are H; with the proviso that when n is 0, R 1 is hydrogen, R 3 is methyl, R 4 is hydrogen and R 5 is methyl or unsubstituted phenyl, then R 2 is other than unsubstituted phenyl, methoxyphenyl, hydroxyphenyl or methanesulfonylaminophenyl, and when n is 0, R 1 is hydroxy, R 3 is methyl, R 4 is hydrogen and R 5 is methyl, then R 2 is other than unsubstituted phenyl or trifluoromethylphenyl.