abstract |
The present invention relates to a compound represented by the formula (I): n n(wherein, R 3 , R 6 , R 7 and R 21 are the same as or different from one another and each represents a hydroxyl group etc.), a pharmacologically acceptable salt thereof or a hydrate of them. The compound (I) of the present invention suppresses angiogenesis, in particular, suppresses VEGF production in a hypoxic condition and is useful as a therapeutic agent for treating solid cancer. |