3H-Pyrrolo[2,1,5-de]quinolizin-3-one,7-[(decahydro-8-methylpyrido[2,1,6-de]quinolizin-3a(1H)-yl)methyl]-4,5,5a,6-tetrahydro-8-methyl-,[3aR-[3aa(S*),6aa,8a,9ab]]-