Patent ID: 7618946

Claim:
A compound of the formula (I): wherein: R 2 is selected from hydrogen, hydroxyl, O-alkyl, O-alkenyl, O-benzoyl, O-alkanoyl, O-alkenoyl, O-aryl, O-heterocyclic, O-heteroaryl or wherein R 5 and R 7 are independently be selected from hydrogen, alkanoyl, alkenoyl, benzoyl or benzoyl alkyl substituted alkanoyl; R 3 is selected from hydroxyl, O-alkanoyl, O-alkenoyl, O-benzoyl, O-alkyl, O-alkenyl, O-aryl, O-heterocyclic or O-heteroaryl; R 4 is selected from —CH 2 OH, COOH, CH 2 OCOCH 3 , COO alkyl, COO aryl, CH 2 COO alkyl, COO-heterocyclic, COO-heteroaryl, CH 2 —O aryl, CH 2 O heterocyclic or CH 2 O heteroaryl; R 6 is selected from hydrogen or R 1 is selected from hydrogen or alkyl; or pharmaceutically acceptable salts thereof, with the provisos that when: R 2 is OH, R 3 is OH, R 4 is CH 2 OH, and R 6 is xylopyranosyl, R 1 is not H; R 4 is CH 2 OH and R 3 is O-alkanoyl R 2 is not O-acetyl; R 4 is CH 2 OH and R 2 is O-alkenoyl R 3 is not hydroxyl; and R 4 is CH 2 OH and R 3 is hydroxyl then R 2 is not hydroxyl.