Triterpenoid saponins from Clematis argentilucida

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► Five saponins were first reported from Clematis argentilucida.
► One of them is a new compound with 12-oleanene-3,28-diol as aglycone.
► This type of aglycone is first reported in genus Clematis.
► May be there are differences in the biosynthetic pathways of this species.
► Saponins with hydroxymethyl at C-17 could be a chemotaxonomic marker of the plant.