21640-98-2
5-chloro-4-hydroxy-quinoline-2-carboxylic acid ethyl ester
→
855634-12-7
3,5-dichloro-4-oxo-1H-quinoline-2-carboxylic acid
855634-11-6
3,5-dichloro-4-hydroxy-quinoline-2-carboxylic acid ethyl ester