5-Oxohexanoic acid ethyl ester;5-ketohexanoic acid ethyl ester;13984-57-1;ZINC02534768;192090_ALDRICH;Ethyl 5-oxohexanoate;5-Oxohexanoic acid ethyl ester;EINECS 237-776-7;Ethyl 4-acetylbutyrate;Hexanoic acid, 5-oxo-, ethyl ester