QD093205

Dihydroergotamine mesilate EP Impurity E

Synonyms: (6aR,9R,10aR)-N-((2R,5S,10aS,10bS)-5-benzyl-10b-hydroxy-2-isopropyl-3,6-dioxooctahydro-2H-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