63938-40-9 Acetic acid, ((3-((dimethoxyphosphinyl)oxy)-1-oxo-2-butenyl)amino)-, ethyl ester ENT 25,716 Ethyl ((3-((dimethoxyphosphinyl)oxy)-1-oxo-2-butenyl)amino)acetate GLYCINE, N-(3-HYDROXYCROTONOYL)-, ETHYL ESTER, DIMETHYL PHOSPHATE SD-6830 Shell SD-6830