| 摘要 |
<p>Compounds of general formula (I) or salts thereof are useful as preventive or therapeutic agents for diabetes and so on wherein R1 is an optionally substituted hydrocarbon group or the like; X is a free valency or the like; Y is oxygen or the like; A is a heterocycle or the like; R2 is hydrogen or the like; R?3 is OR9¿ or the like; and R?4 and R5¿ are each hydrogen or the like, with the provisos that when A is optionally substituted indole, Y is not oxygen or sulfur, that when Y is oxygen, sulfur, -SO-, -SO¿2?-, or -NR?8¿-, A is not an optionally substituted benzene ring, and that when Y is oxygen and A is an optionally substituted, 4-pyrone, 4-pyridone, or pyridine N-oxide ring, R2 is not a thiazolyl or thiadiazolyl group substituted with optionally protected amino.</p> |
