Patent ID: 8486994

Claim:
A compound of formula (III) or a pharmaceutically acceptable salt thereof wherein X is hydrogen, halogen, cyano, nitro, hydroxyl, haloalkyl, alkyl, or O—R where R is a lower alkyl group; n is 0, 1, 2, 3, 4, or 5; and R p is H, lower alkyl, or a progroup selected from (C 2 -C 12 )alkanoyloxymethyl, 1-alkanoyloxy)ethyl having from 4 to 9 carbon atoms, 1-methyl-1-(alkanoyloxy)-ethyl having from 5 to 10 carbon atoms, alkoxycarbonyloxymethyl having from 3 to 6 carbon atoms, 1-(alkoxycarbonyloxy) ethyl having from 4 to 7 carbon atoms, 1-methyl-1-(alkoxycarbonyloxy) ethyl having from 5 to 8 carbon atoms, N-(alkoxycarbonyl) aminomethyl having from 3 to 9 carbon atoms, 1-(N (alkoxycarbonyl)amino)ethyl having from 4 to 10 carbon atoms, 3-phthalidyl, 4 crotonolactonyl, gamma-butyrolacton-4yl, di-N,N-(C 1 -C 2 )alkylamino(C 2 C 3 )alkyl, carbamoyl-(C 1 -C 2 )alkyl, N,N-di(C 1 -C 2 )alkylcarbamoyl-(C 1 -C 2 )alkyl and piperidino-, pyrrolidino- or morpholino(C 2 -C 3 )alkyl; R p′ is H, lower alkyl, or a progroup selected from provided that R p is not H or lower alkyl when R P′ is H; and R p ′ is not H or lower alkyl when R P is H.