(6aR,9R)-5-Bromo-N-[(2R,5S,10aS,10bS)-10b-methoxy-2-(1-methylethyl)-5-(2-methylpropyl)-3,6-dioxooctahydro-8H-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; 2-Bromo-10′b-O-methyl-α-ergocryptine
