Minor saponins constituents from Panax Notoginseng tap root

From the tap root of Panax notoginseng,ten compounds were isolated by repeated column chromatography with silica gel and C₁₈.Their structures were identified by spectroscopic methods as ginsenoside Rh₄( 1 ),notoginsenoside R₂( 2 ),ginsenoside Rh₁( 3 ),ginsenoside F₁( 4 ),20(S)-ginsenoside Rg₂( 5 ),3-O-β-D-glucopyranosyl-(1→2)-β-D-glucopyranoside-12β, 25-dihydroxydammar-(E)20(22)-ene( 6 ),vinaginsenoside R₁₅( 7 ),vinaginsenside R₃( 8 ),pseudoginsenoside RT_3( 9 ),and 6-O-(β-D-glucopyranosyl)-20-O-(β-D-xylopyranosyl)-3β,6α,12β,20(S)-tetrahydroxydammar-24-ene( 10 ),respectively.Compounds 6-10 were first isolated from this plant,and compounds 6 and 10 were identified from the nature for the first time.