Dihydroergotamine Mesylate Impurity 2

Chemical Name: (6aR,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)-7-ethyl-4,6,6a,7,8,9-hexahydroindolo[4,3-fg]quinoline-9-carboxamide

Smile: O=C([C@H](C=C12)CN(CC)[C@]2([H])CC3=CNC4=C3C1=CC=C4)N[C@@](O5)(C)C(N6[C@]5(O)C(CCC7)N7C([C@@H]6CC8=CC=CC=C8)=O)=O