摘要:
本文对牛蒡子中的化学成分进行了研究.采用多种柱色谱方法并结合制备型HPLC的方法分离纯化牛蒡子中的化学成分,进一步利用IR、UV、CD、MS、HR-ESI-MS、1D和2D NMR等技术对分离得到的化合物进行结构分析和鉴定.从牛蒡子80%乙醇提取物中分离鉴定了10个化合物,分别为:(7R,8R)-4,7,9,9′-tetrahydroxy-3,3′-dimethoxy-8-4′-oxyneolign-7′-ene-9′-O-β-D-glucopyranoside (1)、(7R,8R)-4,7,9,9′-tetrahydroxy-3,3-dimethoxy-8-O-4′-neolignan-9′-O-β-D-glucopyranoside (2)、(7R,8R)-4,7,9,9′-tertahydroxy-3,3′-dimethoxy-8-4′-oxyneolignan (3)、(7S,8R)-dihydrodehydrodiconiferylalcohol-4-O-ββ-D-glucop yranosi de (4)、(7S,8R,7′R,8′R)-pinoresinol-4,4 ′-di-O-β-D-glucop yrano-side (5)、(8S,7′S,8′R)-4,4′,9′-trihydroxy-3,3′-dimethoxy-7′,9-epoxylignan-7-oxo-4′-O-β-D-glucopyranoside (6)、1-O-β-D-xylopyranosyl-(1→6)-O-β-D-glucopyranoside-2-methoxy-4-hydroxyphenol (7)、1-O-β-D-xylopyranosyl-(1→6)-O-β-D-glucopyranoside-3-methoxy-4-hydroxyphenol (8)、4-O-β-D-xylopyranosyl-(1→6)-O-β-D-glucopyranoside-4-hydroxy-3-methoxybenzylalcohol (9)和2-phenethyl β-primeveroside (10).其中化合物1为一个新的8-O-4′型木脂素,化合物2~10均为首次从牛蒡子中分离得到.