1-Methyl-2-oxopropyl butanoate 1-Methyl-2-oxopropyl butyrate 84642-61-5 Acetoyl butyrate Butan-3-one-2-yl butanoate Butan-3-one-2-yl butanoate (natural) Butanoic acid, 1-methyl-2-oxopropyl ester EINECS 283-438-7 FEMA No. 3332