4-Oxo-4H-1-benzopyran-2-carboxylic acid 4-Oxo-4H-chromene-2-carboxylic acid 4940-39-0 4H-1-BENZOPYRAN-2-CARBOXYLIC ACID, 4-OXO- 5-18-08-00312 (Beilstein Handbook Reference) Atremon BRN 0146442 Chromocarb Chromocarb [DCF:INN] Chromocarbe [INN-French] Chromocarbum [INN-Latin] Chromone-2-carboxylic acid Chromonecarboxylic acid Cromocarbo [INN-Spanish] EINECS 225-583-0 LP-1