Benzofurylpyrone derivatives

摘要

There is provided benzofuryl- alpha -pyrone derivative represented by the following structural formula (I): wherein R<1> represents a hydrogen atom or an alkyl group of 1 to 5 carbons; R<2> represents hydrogen, -CO-R<5> or -SO2R<6>; R<3> represents hydrogen, an alkyl group of 1 to 5 carbons, etc.; and R<4> is a substituent attached to the 4-carbon, 5-carbon, 6-carbon or 7 carbon of the benzofuran ring; and their salts. The compounds are useful as therapeutic agent for hypertriglyceridemia, lipid metabolism enhancers, or prophylactic and/or therapeutic agents for arteriosclerosis.