(8aα,10aα,15bβ)-2,3,4,5,7,8,8a,10,10a,11,12,13,14,15b-Tetradecahydro-15H-1α,5α-imino-10β,15aβ-methano-1H,6H,9H-5a,14a-diazadibenz[b,fg]octalene