Lower alkanoic acid derivatives of 2-oxo-benzoxazolines and aldose reductase inhibiting compositions thereof

摘要

The invention is directed to compounds of the formula wherein Ra1 is phenyl, R2 is halogen, R3 is carboxy or lower alkoxycarbonyl, Ya is oxygen, A is C1-C6 alkylene, pharmaceutically acceptable salts thereof, and aldose reductase inhibiting pharmaceutical compositions thereof.