4H-Pyrano(3,2-g)quinoline-2,8-dicarboxylic acid, 6-chloro-4-oxo-10-propyl-, disodium salt 6-Chloro-4-oxo-10-propyl-4H-pyrano(3,2-g)quinoline -2,8-dicarboxylate 6-Coppqd 75452-50-5