OXYGENIC HETEROCYCLIC COMPOUNDS

摘要

The present invention relates to oxygen-containing heterocyclic compounds represented by the following formula (I): <CHEM> wherein m represents an integer of 0 to 4; R<1>, R<2>, R<3> and R<4> independently represent a hydrogen atom, substituted or unsubstituted lower alkyl, etc.; R<5> represents substituted or unsubstituted lower alkoxy etc.; R<6> represents a hydrogen atom etc.; and Y represents the following formula (II): <CHEM> wherein R<9> represents cyano etc., R<10> represents a hydrogen atom etc., R<11> represents carboxy etc., and R<12> represents a hydrogen atom etc.; and the like; or pharmaceutically acceptable salts thereof.