| 摘要 |
The alpha-substituted carboxylic acid derivatives having the formula (I):wherein R1 is an alkyl group, etc., R2 is a hydrogen atom, etc., R3 is a hydrogen atom, etc., A is =CH-group, etc., B is an oxygen atom, etc., W1 is a C1-C8 alkylene group, W2 is a single bond or a C1-C8 alkylene group, X is a hydrogen atom, etc., Y is an oxygen atom, etc., and Z1 is an alkoxy group, etc., and pharmacologically acceptable salts, esters and amides thereof are useful for treatment and/or prevention of diabetes mellitus, impaired glucose tolerance, gestational diabetes mellitus, or the like. Some of the derivatives of the formula (I) are novel compounds.
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