| abstract |
Disclosed is a compound represented by the formula (1) below, a prodrug thereof, or a pharmaceutically acceptable salt of either of them. Also disclosed are a pharmaceutical product, pharmaceutical composition and the like containing such a compound which are useful for effectively treating and preventing proliferative diseases such as cancers. (1) [In the formula, X represents an optionally substituted aryl group or heteroaryl group; Cy represents an optionally substituted 4-7 membered single heterocyclic ring or 8-10 membered fused heterocyclic ring; and Z represents O, S or NRa.] |