19780-35-9 2,3-Epoxybutyric acid, ethyl ester BUTYRIC ACID, 2,3-EPOXY-, ETHYL ESTER EINECS 243-300-9 Ethyl 2,3-epoxybutyrate Ethyl-2,3-epoxybutyrate Ethylester kyseliny 2,3-epoxymaselne [Czech]