(3aS,3bS,5aR,7R,9aS,9bS,11aS)-2-amino-7-hydroxy-9a,11a-dimethyl-3,3a,3b,4,5,5a,6,7,8,9,9a,9b,11,11a-tetradecahydro-10H-naphtho[2,1-e]indol-10-one