What is claimed is:
Compound V.2 having the following general formula:
or a salt or solvate thereof wherein:
R1 is -(C1-C4)alkyl, -(C2-C4)alkenyl, -(C2-C4)alkynyl, or (C1-C4)alkoxy, each of which is unsubstituted or substituted with 1 or 2 independently selected R5 groups;R2 is -H or -CH3;R2' is -H or -CH3;each R3 is independently:
(a) -OT3, or -OC(=O)T3; or(b) -C(=O)T3,...