Dihydroergotamine Mesylate Impurity 4

Chemical Name: (9R)-N-((2R,5S,10bS)-5-benzyl-10b-hydroxy-2-methyl-3,6-dioxooctahydro-8H-oxazolo[3,2-a]pyrrolo[2,1-c]pyrazin-2-yl)-5-hydroxy-7-methyl-4,6,6a,7,8,9,10,10a-octahydroindolo[4,3-fg]quinoline-9-carboxamide

Smile: O=C([C@H](C1)CN(C)C2C1C3=CC=CC4=C3C(C2)=C(O)N4)N[C@@](O5)(C)C(N6[C@]5(O)C(CCC7)N7C([C@@H]6CC8=CC=CC=C8)=O)=O