Patent ID: 7384946

Claim:
A compound of the formula wherein: R 1 is selected from the group consisting of hydrogen, halogen, C 1-4 alkyl, C14 alkanoyl and aroyl; G 1 is CH 2 —CH2 or CH═CH; G 2 is C 4-7 alkyl or a group of the formula (a), (b) or (c): X is a group of the formula (d): —Y—Ar—Y— (d) Y is, independently, selected from the group consisting of a bond, O, S, NR 2 , —NR 2 —C 1-4 alkyl-, and C 1-4 alkyl- each of these alkyl groups may contain a heteroatom selected from O, NR 2 , or S; R 2 is a hydrogen, C 1-4 alkyl or C 1-4 alkyl-aryl; Ar is selected from the group consisting of an optionally substituted phenyl rings, optionally substituted 5- or 6- membered aromatic heterocyclic ring or an optionally substituted, fused bicyclic, tricyclic aromatic or heteroaromatic ring system.