RESUMO
Objective To study the chemical constituents of Opuntia dillenii.Methods Many kinds of chromatographic methods were used in the isolation procedure,while the structures of compounds were elucidated by various spectral data.Results A new ester together with five known compounds was isolated from the 80% ethanolic extract from cactus stems.The compounds were characterized as dimethyl(2R)-2-[(4-ethoxy-4-oxobutanoyl)oxy] succinate(Ⅰ),guaiacylglycerol-?-ferulic acid ether(Ⅱ),methyl p-hydroxy-(E)-cinnamate(Ⅲ),methyl 4-hydroxybenzoate(Ⅳ),and benzoic acid(Ⅴ).Conclusion Compound Ⅰ,named opuntiaester,is a new one and compounds Ⅱ-Ⅳ are obtained from the plants of Opuntia Mill.for the first time.
RESUMO
Objective To study the chemical composition from leaves of Smallanthus sonchifolius.Methods Some chromatography methods were used in the isolation procedure,while the structures were determined on the aids of NMR and MS spectral analyses.Results A new compound,together with five known compounds,was isolated from the ethanolic extract of the leaves.The new compound is characterized as 5,8-dihydroxyl-(5H,8H)-?-ionol(Ⅰ).Other compounds are obtained for the first time from the title plant and identified as ent-kaurane-3?,16?,17-triol(Ⅱ),entkaurane-16?,17-diol-19-oic acid(Ⅲ),3,4-dihydroxybenzaldehyde(Ⅳ),1-pentacosanol(Ⅴ),and 1-octacosanol(Ⅵ),respectively.Conclusion Compounds Ⅰ-Ⅵ are isolated from the plants of genus Smallanthus for the first time.Compound Ⅰ is a ?-ionol derivate firstly isolated from genus Smallanthus.It is named as sonchifolol.