Objective:To study the chemical constituents of stem of Camellia oleifera.Methods:The chemical constituents were isolated and purified by column chromatography on silica gel,ODS,Sephadex LH-20 and MPLC.Their structures were elucidated on the basis of physicochemical properties and special analysis.Results:Seven compounds were isolated from the stem of Camellia oleifera,whose structures were elucidated as (-)-pinoresinol (1),(-)-medioresinol (2),skullcapflavone Ⅱ (3),betulinic acid (4),ursolic acid (5),3-O-β-D-glucopyranosyl-(1 →2)-β-D-xylopyransoyl-(1 →3)-[β-D-glucopyranosyl-(1 →2)]-β-D-glucuronopyranosyl-22α-an-geloyloxyolean-12-ene-15α,16α,28-triol(6) and oleanolic acid (7).Conclusion:Compounds 1 ~ 6 are isolated βrom this plant for the first time,and compounds 1 ~3 are isolated from this genus for the first time.
Stem of Camellia oleifera Abel.CamelliaChemical constituents