(41S,13aS)-12-(ethoxycarbonyl)-13a-ethyl-1,2,3,4,41,5,6,13a-octahydroindolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine 4-oxide
(41S,13aS)-12-(ethoxycarbonyl)-13a-ethyl-1,2,3,4,41,5,6,13a-octahydroindolo[3,2,1-de]pyrido[3,2,1-ij][1,5]naphthyridine 4-oxide