番石榴叶的化学成分

Identification of chemical constituents from leaves of Psidium guajava

目的研究番石榴叶的化学成分。方法运用多种色谱技术方法对番石榴叶的化学成分进行了系统的研究,并根据波谱数据和理化性质确定了其结构。结果分离鉴定了7个化合物,分别为槲皮素-3-O-α-L-吡喃阿拉伯糖苷(quercetin-3-O-α-L-arabinopyranoside,1)、槲皮素-3-O-α-L-呋喃阿拉伯糖苷(quercetin-3-O-α-L-arabinofuranoside,2)、槲皮素-3-O-β-D-吡喃半乳糖(quercetin-3-O-β-Dgalactopyanoside,3)、2α,3β-二羟基乌索烷(2α,3β-di-hydroxy-ursane,4)、madecassic acid(5)、(7R,8S)二氢脱氢二松柏醇-9-O-β-D-吡喃葡萄糖苷((7S,8R)-5-methoxydehydrodiconiferyl alcohol-9-β-D-glucopyranoside,6)、quadranoside III(7)。结论化合物4-7为首次从番石榴属中分离得到。

Objective To study the constituents of leaves of Psidium guajava.Methods A variety of column chromatographic techniques were used for the isolation and separation of chemical constituents.Their structures were established on the basis of spectral data.Results Seven compounds were identified as quercetin-3-O-α-L-arabinopyranoside（1）,quercetin-3-O-α-L-arabinofuranoside（2）,quercetin-3-O-β-D-galactopyanoside（3）,2α,3β-di-hydroxy-ursane（4）,madecassic acid（5）,（7S,8R）-5-methoxydehydrodiconiferyl alcohol-9-β-D-glucopyranoside（6）,quadranoside III（7）.Conclusions Compounds 4-7 are isolated from the plant of P.guajava for the first time.