乙基4-氰基-2-吡啶甲酸;
ethyl 4-cyanopicolinate;2-ethoxycarbonyl-4-pyridinecarbonitrile;Ethyl-4-cyan-2-pyridincarboxylat;4-cyano-2-ethoxycarbonylpyridine;ethyl 4-cyano-2-pyridinecarboxylate;
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