Patent ID: 7393870

Claim:
A compound represented by the formula: wherein R 5 is selected from the group consisting of halogen, nitro, hydroxy, hydrocarbyl, substituted hydrocarbyl, amide, thioamide, amine, thioether and sulfonyl; X is O; R 7 is selected from the group consisting of halogen, nitro, hydroxy, hydrocarbyl, substituted hydrocarbyl, amide, thioamide, amine, thioether and sulfonyl and phosphonic acid; R 6 is selected from the group consisting of hydrogen, hydrocarbyl and substituted hydrocarbyl; b is 0 or an integer from 1 to 3; a is 0 or an integer of from 1 to 3; the wavy line represents a E or Z bond and pharmaceutically acceptable salts thereof.