Patent ID: 7553867

Claim:
A compound represented by the formula (I): wherein R is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, p is 0, 1 or 2, and when p is 2, each R may be the same or different, R 1 is a hydrogen atom or an optionally substituted hydrocarbon group, R 2 is an optionally substituted aromatic group, Ring A is an optionally substituted benzene, X 1 is an oxygen atom or a sulfur atom, X 2 is an oxygen atom or —S(O) n —, wherein n is 0, 1 or 2, Y is a bond, an oxygen atom, —S(O) m —, —C(═O)—N(R 3 )— or —N(R 3 )—C(═O)— and R 3 is a hydrogen atom, an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, and m is 0, 1 or 2, M 1 and M 2 may be the same or different and are each independently a bond or an optionally substituted divalent aliphatic hydrocarbon group, M 3 is an optionally substituted divalent aliphatic hydrocarbon group and M 4 is an optionally substituted divalent aliphatic hydrocarbon group, or a pharmacologically acceptable salt thereof, or a prodrug thereof, provided that (1) when Y is an oxygen atom or —S(O) m —, M 1 is not a bond, and (2) when Y is a bond and one of M 1 and M 2 is a bond, the other of M 1 and M 2 is neither a bond nor methylene.