6622-18-0;NSC56540;AC1NS94F;NSC-56540;A835371;ethyl (2E)-2-(anilinomethylidene)-3-oxobutanoate;(2E)-2-(anilinomethylidene)-3-oxobutanoic acid ethyl ester;ethyl (2E)-3-oxidanylidene-2-(phenylazanylmethylidene)butanoate
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