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)-, hydrochloride, (S-(R*,S*))-, mixt. with 1-(4-hydroxy-3-methoxyphenyl)-1,2,3-propanetriol