108233-39-2 Glycine, 3-(((2E)-4-methoxy-1,4-dioxo-2-butenyl)amino)-L-alanyl- Glycine, N-(3-((4-methoxy-1,4-dioxo-2-butenyl)amino)-L-alanyl)-, (E)- N3-4-Methoxyfumaroyl-L-2,3-diaminopropanoic acid