| 摘要 |
Disclosed herein are an .alpha.-substituted phenylpropionic acid derivative represented by the following general formula (1): (see fig. I) wherein W is a (substituted) lactam ring, A is an alkylene or alkyleneoxy group or the like, X is O, S, NH or CH2, Y1 is an amino, hydroxy or lower alkoxy group, R1 is H, alkyl group or the like, R2 is an alkyl or phenyl group or the like, and R3 is H, alkyl or alkoxy group or the like, or a salt thereof, and a medicine comprising such a compound as an active ingredient. The compound is excellent in the effect of lowering blood glucose and lipid.
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