英文别名5-Ethylpyridine-2,3-dicarboxylic acid diethyl ester; Imazethapyr Impurity; 5-ETHYL-2,3-PYRIDINEDICARBOXYLIC ACID DIETHYL ESTER; 2,3-Pyridinedicarboxylicacid, 5-ethyl-, 2,3-diethyl ester; 2,3-Pyridinedicarboxylicacid,5-ethyl-,2,3-diethyl ester; diethyl ester of 5-ethylpyridine-2,3-dicarboxylic acid; diethyl 5-ethyl-2,3-pyridinedicarboxylate; 5-ethyl-2,3-diethoxycarbonylpyridine; 5-ethylpyridine dicarboxylic acid,diethyl ester 
