(6aS)-9-(2-{[(1S)-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinolin-1-yl]methyl}-4,5-dimethoxyphenoxy)-1,2,10-trimethoxy-6-methyl-5,6,6a,7-tetrahydro-4H-dibenzo[de,g]quinoline