ABSTRACT
Objective: To study the chemical constituents from the root bark of Litsea glutinosa. Methods: Silica gel and Sephedex LH-20 column chromatographies as well as semi-preparative HPLC were applied to isolate and purify the compounds. Their structures were elucidated based on the spectrum analysis. Results: Fifteen compounds were obtained and identi-fied as schizandriside (1), lyonside (2), coclaurine (3), alangisesquin A (4), alangisesquin B (5), dihydrobuddlenol (6), ssioriside (7), dendranthemoside B (8), epi-anhydrocinnzeylanol (9), isolariciresinol-5’-methoxy-iso-larixa-9’-O-β-D-xylopyranoside (10), benzyl alcohol-β-D- glucopyranoside (11), phenylethyl-β-D-glucopyranoside (12), n-butyl-β-D-fructoside (13), N-cis-feruloyl tyramine (14), and N-trans-sphingoyl tyramine (15). Conclusion: Compounds 1-13 are isolated from this plant for the first time.
ABSTRACT
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.