Abstract
Four new bisdesmosidic saponins each containing eight carbohydrate units were isolated from Solidago canadensis. GC, GC-MS, FABMS analysis and mainly the use of 2D NMR techniques allowed their identification as bayogeninglycosides (canadensissaponins 1–4) 3- O-[β- d-glucopyranosyl-(1→3)-β- d-glucopyranosyl]-28- O-{α- l- rhamnopyranosyl-(1→3)-β- d-xylopyranosyl-(1→4)-[β- d-xylopyranosyl-(1→3)]-α- l-rhamnopyranosyl-(1→2)-[β- d-apio- d-furanosy]-(1→3)]-β- d-6-deoxyglucopyranosyl-(1→}-bayogenin; -(1→2)-[β- d-apio- d-furanosyl-(1→3)]-arabinopyranosyl-(1→}-bayogenin; -[α- l-rhamnopyranosyl-(1→3)]-β- d-6-deoxyglucopyranosyl-(1→}-bayogenin and -[α- l-rhamnopyranosyl-(1→3)]-arabinopyranosyl-(1→}-bayogenin.
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