2-(3-Carboxy-4-hydroxyphenyl)cinchoninic acid 2-(p-Hydroxyphenyl)quinoline-4,3'-dicarboxylic acid 3'-Carboxy-4'-hydroxycinchophen 4-Quinolinecarboxylic acid, 2-(3-carboxy-4-hydroxyphenyl)- 525-48-4 Cinchoninic acid, 2-(3-carboxy-4-hydroxyphenyl)- Hexophan NSC59800