Quinazoline derivatives, compositions thereof and their use in treating diabetic complications

Abstract

The invention relates to compounds of the formula: ##STR1## in which R.sup.1 and R.sup.2 are each hydrogen, halogen, lower alkoxy or halo(lower)alkyl, R.sup.3 is dihalophenyl, naphthyl(lower)alkyl, phenyl(lower)alkyl substituted by one or two substituent(s) selected from the group consisting of halogen, lower alkoxy, halo(lower)alkyl and lower alkyl, or thienyl(lower)alkyl, R.sup.4 is carboxy or protected carboxy, Y is carbonyl, thiocarbonyl or sulfonyl and Z is lower alkylene, and pharmaceutically acceptable salts thereof, useful in the treatment of diabetic complications.

Dependencies are inferred from the claim text.