Ergotamine EP Impurity B

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

Synonym: Ergotaminine

Smile: O=C([C@](C=C12)([H])CN(C)[C@]2([H])CC3=CNC4=C3C1=CC=C4)N[C@](C5=O)(C)OC6(O)N5C(CC7=CC=CC=C7)([H])C(N8C6([H])CCC8)=O