(S)-1,2,3,4-Tetrahydro-6,7-dimethoxy-2-methyl-1-isoquinolinemethanol 1-Isoquinolinemethanol, 1,2,3,4-tetrahydro-6,7-dimethoxy-2-methyl-, (S)- 97549-54-7 N-Methylcalycotomine