| 摘要 |
A preventive agent and/or therapeutic agent for a complication of diabetes comprising a compound represented by formula (I) wherein each of R<1>, R<2>, R<3> and R<4> is independently hydrogen, a substituted or unsubstituted alkoxy or the like, R<5> is a substituted or unsubstituted alkyl, a substituted or unsubstituted aryl or the like, R<6> is hydrogen, a substituted or unsubstituted alkyl or the like, R<7> is hydrogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted aryl or the like, A is S or O and a dashed line represents the presence or the absence of a bonding, a pharmaceutically acceptable salt thereof or a hydrate of these compounds. |
