英文别名ETHYL 8-NITRO-4-OXO-4H-BENZOPYRAN-2-CARBOXYLATE; 4H-1-Benzopyran-2-carboxylic acid, 8-nitro-4-oxo-, ethyl ester; 8-NITRO-4-OXO-4H-1-BENZOPYRAN-2-CARBOXYLIC ACID ETHYL ESTER; ethyl 8-nitro-4-oxochromene-2-carboxylate; 8-nitro-2-ethoxycarbonyl-4-oxo-4H-1-benzopyran; 2-carboethoxy-8-nitro-4-oxo-4H-1-benzopyran; 8-nitro-4-oxo-4H-chromene-2-carboxylic acid ethyl ester; ethyl 8-nitro-4-oxo-4H-1-benzopyran-2-carboxylate 
