(4S,4aS,4a1R,5aS,8aR,8a1S,15aS)-2,3,4,4a,4a1,5,5a,7,8,8a1,15,15a-Dodecahydro-14H-4,6-methanoindolo[3,2,1-ij]oxepino[2,3,4-de]pyrrolo[2,3-h]quinolin-14-one-3,4-d2