1(3H)-ISOBENZOFURANONE, 6,7-DIMETHOXY-3-(5,6,7,8-TETRAHYDRO-4-METHOXY-6-METHYL-1 1(3H)-Isobenzofuranone, 6,7-dimethoxy-3-(5,6,7,8-tetrahydro-4-methoxy-6-methyl-1,3-dioxolo(4,5-g)isoquinolin-5-yl)-, N-oxide, (S-(R*,S*))- 54383-36-7 l-alpha-Narcotine N-oxide