6,7-Dimethoxy-1,2,3,4-tetrahydroisoquinoline hydrochloride 97%6,7-Dimethoxy-1,2,3,4-tetrahydroisoquinoline hydrochloride盐酸6,7-二甲氧基-1,2,3,4-四氢异喹啉6,7-Dimethoxy-1,2,3,4-tetrahydroisoquinoline hydrochloride6,7-Dimethoxy-1,2,3,4-tetrahydroisoquinolinehydrochloride6,7-Dimethoxy-1,2,3,4-tetrahydro-isoquinoline hydrochloride6,7-二甲氧基-1,2,3,4-四氢异喹啉 盐酸盐