2-Butenoic acid, 4-((2-amino-2-carboxyethyl)amino)-4-oxo-, 1-methyl ester, (S-(E))- 96920-07-9 FMDP N(3)-(4-Methoxyfumaroyl)-2,3-diaminopropionic acid N(3)-(4-Methoxyfumaroyl)-L-2,3-diaminopropionic acid