Butanoicacid, 3-oxo-2-(phenylhydrazono)-, ethyl ester (9CI); Butyric acid, 2,3-dioxo-,ethyl ester, 2-(phenylhydrazone) (6CI,7CI,8CI); Ethyl 2,3-dioxobutanoate2-phenylhydrazone; Ethyl 3-oxo-2-(phenylhydrazono)butanoate
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