1-((3,4-Dihydro-6,7-dimethoxy-1H-2-benzopyran-1-yl)methyl)-4-(3-methylphenyl)piperazine 2HCl 70070-18-7 Piperazine, 1-((3,4-dihydro-6,7-dimethoxy-1H-2-benzopyran-1-yl)methyl)-4-(3-methylphenyl)-, dihydrochloride