Bromocriptine Mesilate EP Impurity A

Chemical Name: (6aR,9R)-5-bromo-7-methyl-N-[(2R,5S)-2-(1-methylethyl)-5-(2-methylpropyl)-3,6-dioxo-2,3,5,6,9,10-hexahydro-8H-oxazolo[3,2-a]pyrrolo[2,1-c]pyrazin-2-yl]-4,6,6a,7,8,9-hexahydroindolo[4,3-fg]quinoline-9-carboxamide (as per EP)