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, hydrochloride, (S-(R*,S*))- NP7250200 Narcotine N-oxide hydrochloride