2,4-dioxopentanoic acid methyl ester;2,4-diketovaleric acid methyl ester;20577-61-1;AIDS-191386;AIDS191386;EINECS 243-891-3;Methyl acetopyruvate;Methyl 2,4-dioxopentanoate;Pentanoic acid, 2,4-dioxo-, methyl ester;FR-1171;SBB004133