(6S)-2-[(3-chloro-4-fluorophenyl)methyl]-N,8-diethyl-1,2,6,7,8,9-hexahydro-10-hydroxy-6-methyl-1,9-dioxo-Pyrazino[1',2':1,5]pyrrolo[2,3-d]pyridazine-4-carboxamide [ 870005-19-9 ]