butyl 4-[[4-[[5-chloro-2-oxo-1-(piperidin-1-ylmethyl)indol-3-ylidene]amino]benzoyl]amino]benzoate

6-chloro-2-(4-ethylphenyl)quinoline-4-carboxylic acid

6-chloro-2-(4-ethoxyphenyl)quinoline-4-carboxylic acid

6-chloroquinoline-2,4-dicarboxylic acid