Patent ID: 8618158

Claim:
A compound of Formula I, or Formula II, or a pharmaceutically acceptable salt thereof, wherein in both formulae I and II: X is selected from O or S; R 1 is selected from substituted or unsubstituted aryl, and substituted or unsubstituted aralkyl; R 2 is selected from: (i) hydroxy-2,2-dimethylpropyl, hydroxy-2,2-cyclopropylpropyl, 2-hydroxymethyl allyl, and a succinic acid derivative, (ii) hydroxycyclooctyl, hydroxymethylcyclohexylmethylene, and hydroxycyclohexyl, and (iii) hydroxymethylbenzyl; R 3 is selected from substituted or unsubstituted aryl, and substituted or unsubstituted aralkyl and R 4 -R 7 represents groups R 4 , R 5 , R 6 and R 7 which are independently selected from hydrogen, halo, hydroxy, substituted or unsubstituted alkyl, substituted or unsubstituted hydroxyalkyl, substituted or unsubstituted alkenyl, substituted or unsubstituted alkynyl, substituted or unsubstituted heteroaryl, substituted or unsubstituted heteroaralkyl, substituted or unsubstituted alkylamine, substituted or unsubstituted alkoxy, trifluoromethyl, amino, nitro, carboxyl, carbonyl, methylsulfone, trifluoromethylsulfone, cyano and substituted or unsubstituted sulfonamide.