1-((3,4-Dihydro-5,6-dimethoxy-1H-2-benzopyran-1-yl)methyl)piperidine hydrochloride 62979-24-2 Piperidine, 1-((3,4-dihydro-5,6-dimethoxy-1H-2-benzopyran-1-yl)methyl)-, hydrochloride