| 摘要 |
Compounds having the formula (I) : <CHEM> (wherein, A represents a group such as a cyclic group, R<1> and R<2> represent groups such as alkyl groups or hydroxymethyl groups, and n represents 1 or 2), or pharmacologically acceptable salts thereof or pharmacologically acceptable esters thereof have superior activity and stability, and are useful for the treatment and/or prevention of diabetes mellitus, or the like. |
