Patent ID: 6953858

Claim:
A compound having the formula which includes all the possible stereoisomers, wherein: R 1 is phenyl, where said phenyl is substituted with one or more substituents independently selected from alkyl, halogen or hydroxyl; R 2 is a C 2 -C 6 alkenyl group or a C 2 -C 6 alkynyl group, wherein said alkenyl or alkynyl group is a straight or branched chained group, and where said alkenyl or alkynyl group is unsubstituted or is substituted by one or more halogen substituents; R 2′ is H; X is wherein R x is H; Z is S, SO or SO 2 ; R 3 , R 4 , R 5 , R 8 and R 8′ are each H; and R 6 and R 7 are each methyl; or a prodrug, pharmaceutically acceptable salt or solvate thereof.