The present invention addresses the problem of providing a novel chemically activated water-soluble prodrug. The present invention provides a compound represented by formula (1), or a pharmacologically acceptable salt thereof (in the formula, A represents A-0； X1 and X2 are the same as or different from each other and each independently represent a hydroxyl group or -O-C(=O)-Y-(C(R1A)(R1B))n-NH-R2, where X1 and X2 are not simultaneously hydroxyl groups, n is 2, 3, or 4, Y represents an oxygen atom or -NR4, R1A and R1B are the same as or different from each other and each independently represent a hydrogen atom, etc., and R2 represents a hydrogen atom, etc.； and Ra to Rd are optionally present, are the same as or different from each other, and each independently represent a hydrogen atom, etc.).
