Compounds represented by the following general formula: [wherein Ag is an optionally substituted 5- to 14-membered heterocyclic group, etc.; Xg is —O—, —S—, etc.; Yg is an optionally substituted C6-14 aryl group, an optionally substituted 5- to 14-membered heterocyclic group, etc.; and Tg1 is a group represented by the following general formula: (wherein Eg is a single bond or —N(Rg2)—, Rg1 and Rg2 each independently represent a hydrogen atom, an optionally substituted C1-6 alkyl group, etc. and Zg represents a C1-8 alkyl group, a C3-8 alicyclic hydrocarbon group, a C6-14 aryl group, etc.)], salts thereof or hydrates of the foregoing.