63938-42-1 Acetic acid, ((3-((dimethoxyphosphinyl)oxy)-1-oxo-2-butenyl)amino)-, methyl ester ENT 25,742 Glycine, N-(3-hydroxycrotonoyl)-, methyl ester, dimethyl phosphate Methyl ((3-((dimethoxyphosphinyl)oxy)-1-oxo-2-butenyl)amino)acetate SD 7297 Shell SD-7297