Continued examination of the stem bark of Newbouldia laevis afforded three minor phenylethanoid glycosides, designated as newbouldiosides D - F. Their structures were elucidated by spectroscopic methods as β-(3,4-dihydroxyphenyl)ethyl 5-O-syringoyl-β-D-apiofuranosyloxy-(1 → 2)-O-[α-L-rhamnopyranosyl-(1 → 3)]-6-O-E-sinapoyl-β-D-glucopyranoside, β-(3,4-dihydroxyphenyl)ethyl β-D-apiofuranosyloxy-(1 → 2)-O-[α-L-rhamnopyranosyl-(1 → 3)]-6-O-E-sinapoyl-β-D-glucopyranoside, and β-(3,4-dihydroxyphenyl)ethyl β-D-apiofuranosyloxy-(1 → 2)-O-α-L-rhamnopyranosyl-(1 → 2)-6-O-E-sinapoyl-β-D-glucopyranoside, respectively. These metabolites are the first members possessing a sinapoyl structural element. In addition, the series of naturally occurring flavonoids is extended by the identification of 3',4',5,7-tetrahydroxy-5'-methoxyflavanone and apigenin-5-O-α-L-rhamnopyranosyl-7-O-β-D-glucopyranoside obtained from leaf extracts of Markhamia zanzibarica and aromadendrin-7-O-(2″-O-formyl)-β-D-glucopyranoside isolated from Spathodea campanulata. The latter compound is the first example of a flavonoid possessing a formylated glucosyl moiety.

中文翻译：

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紫杉科研究：Newbouldiosides D – F，来自Newbouldia laevis 的次要苯乙醇苷，以及来自Markhamia zanzibarica 和Spathodea campanulata 的新黄酮类化合物

继续检查 Newbouldia laevis 的茎皮，得到了三种次要的苯乙醇苷，命名为 newbouldiosides D - F。它们的结构通过光谱方法阐明为 β-(3,4-dihydroxyphenyl)ethyl 5-O-syringoyl-β-D- apiofuranosyloxy-(1 → 2)-O-[α-L-rhamnopyranosyl-(1 → 3)]-6-OE-sinapoyl-β-D-glucopyranoside, β-(3,4-dihydroxyphenyl)ethyl β-D- apiofuranosyloxy-(1 → 2)-O-[α-L-rhamnopyranosyl-(1 → 3)]-6-OE-sinapoyl-β-D-吡喃葡萄糖苷和β-(3,4-二羟基苯基)乙基β-D -apiofuranosyloxy-(1 → 2)-O-α-L-rhamnopyranosyl-(1 → 2)-6-OE-sinapoyl-β-D-吡喃葡萄糖苷，分别。这些代谢物是第一批具有芥子油结构元素的成员。此外，通过鉴定 3',4',5,7-tetrahydroxy-5' 扩展了天然存在的黄酮类化合物系列 -甲氧基黄烷酮和芹菜素-5-O-α-L-rhamnopyranosyl-7-O-β-D-从Markhamia zanzibarica的叶提取物中获得的吡喃葡萄糖苷和aromadendrin-7-O-(2″-O-formyl)-β-D -从 Spathodea campanulata 中分离的吡喃葡萄糖苷。后一种化合物是具有甲酰化葡糖基部分的类黄酮的第一个例子。