6,7-DIHYDROXY-ISOQUINOLINE DERIVATIVES

摘要

The compound having the formula: wherein R is a straight chain, branched chain or cyclic lower alkyl, a lower alkenyl or a lower alkynyl group which may be substituted by a carboxyl group, and R1 is hydrogen atom or an acetyl group; or a pharmaceutically acceptable salt, physiologically hydrolyzable ester or solvate thereof, processes for the preparation thereof, and an antibacterial agent containing it. Also disclosed are a compound having the formula: wherein R6 is a hydrogen atom or an alkanoyl group, or a salt thereof and a process thereof.