Ergotamine EP Impurity D

Chemical Name: (6aR,9R)-N-[(2R,5S,10aS,10bS)-5-Benzyl-10b-hydroxy-3,6-dioxo-2-(propan-2-yl)octahydro-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: Ergocristine