(S-(R*,S*))-3,4-Dimethoxy-alpha1-(5,6,7,8-tetrahydro-4-methoxy-6-methyl-1,3-dioxolo(4,5-g)isoquinolin-5-yl)-o-xylene-alpha,alpha'-diol 23942-99-6 EINECS 245-946-7 alpha-Narcotinediol