| abstract |
A compound represented by the following general formula (I): (I) (wherein X is CH or N; R1 is C1-6 alkyl, C3-10 cycloalkyl, C2-6 alkenyl, C6-10 aryl, C7-16 aralkyl, a 4- to 10-membered heterocycle containing one to three heteroatoms, etc.; R2 is C7-16 aralkyl, C9-16 aralkenyl, alkyl substituted by a 5- to 10-membered heteroaromatic ring containing one to three heteroatoms, etc.; R3 is hydrogen, C1-6 alkyl, C6-10 aryl, etc.; m is 1 to 2; and n is 1 to 3); or a pharmacologically acceptable salt or ester of the compound. They have excellent activity and are highly safe, and are useful as a therapeutic and/or preventive agent for diabetes, etc. |