.beta.-Anthraquinonecarboxylic acid 117-78-2 2-Anthracenecarboxylic acid, 9,10-dihydro-9,10-dioxo- 2-Anthraquinonecarboxylic acid 2-Anthroic acid, 9,10-dihydro-9,10-dioxo- 2-Carboxyanthraquinone 2-Carboxyl-9,10-anthraquinone Anthraquinone-.beta.-carboxylic acid Anthraquinone-2-carboxylic acid NSC5001