| abstract |
The present invention relates to a compound represented by formula (I) :( see formula I) (in which R, R, R and R are the same or different from each other and each represents a hydroxyl group, etc.), a pharmacologically acceptable salt thereof or a hydrate thereof. The compound (I) of the present invention suppresses angiogenesis, in particular, suppresses the production of VEGF under hypoxic conditions and is useful as a therapeutic agent for treating solid cancer. |