(S)-1,2,3,4-Tetrahydro-4-oxo-2-quinolinecarboxylic acid 2-Quinolinecarboxylic acid, 1,2,3,4-tetrahydro-4-oxo-, (2S)- 2-Quinolinecarboxylic acid, 1,2,3,4-tetrahydro-4-oxo-, (S)- 4-Keto-1,2,3,4-tetrahydroquinoline-2-carboxylic acid 492-26-2 Kynurenine Yellow Quinaldic acid, 1,2,3,4-tetrahydro-4-oxo-, L-