ChEBI: (-)-medioresinol is a lignan that is tetrahydro-1H,3H-furo[3,4-c]furan substituted by a 4-hydroxy-3,5-dimethoxyphenyl group at position 1 and a 4-hydroxy-3-methoxyphenyl group at position 4. It has been isolated from the stems of Sinocalamus affinis. It has a role as a plant metabolite. It is a lignan, a dimethoxybenzene, a furofuran and a polyphenol.