2-Oxo-2H-chromene-3-carboxylic acid 2-Oxobenzopyran-3-carboxylic acid 2H-1-BENZOPYRAN-3-CARBOXYLIC ACID, 2-OXO- 3-Carboxycoumarin 5-18-08-00323 (Beilstein Handbook Reference) 531-81-7 AI3-36066 BRN 0154276 Coumarin-3-carboxylic acid EINECS 208-518-0 G 1 (The rodenticide) (VAN) G 1 (VAN) G 1 (rodenticide) Malonic acid, salicylidene-, delta-lactone NSC 14797 NSC 53239