Patent ID: 7714151

Claim:
A compound of formula (III) or (VIII): wherein R 1 is hydrogen, R 2 , R 3 and R 4 are independently hydrogen, hydroxy or OR 9 , R 7 is hydroxy, R 5 , R 6 and R 8 are independently hydrogen, hydroxy, or C 1-6 alkyl, R 9 is C 1-6 alkyl, one of R 14 and R 15 is hydrogen, the other one of R 14 and R 15 is hydrogen or is phenyl, benzyl, or pyridyl optionally substituted by one of C 1-4 alkyl, nitro, OR 9 , halo or cyano, and the drawing “ - - - ” represents either a single bond or a double bond, or a pharmaceutically acceptable salt thereof.