1-((3,4-Dihydro-6,7-dimethoxy-1H-2-benzopyran-1-yl)methyl)-4-methylpiperazine 5-23-02-00483 (Beilstein Handbook Reference) 70070-20-1 BRN 0815000 Piperazine, 1-((3,4-dihydro-6,7-dimethoxy-1H-2-benzopyran-1-yl)methyl)-4-methyl-