Dihydroergocristine Mesilate EP Impurity E

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

Smile: O=C(N[C@]1(C)O[C@@](O)([C@]2([H])CCCN2C([C@@H]3CC4=CC=CC=C4)=O)N3C1=O)[C@@H](CN([C@@]5(CC6=CNC7=C6C8=CC=C7)[H])C)C[C@@]58[H]