Two previously undescribed megastigmane glucosides, (3S)-3-hydroxy-4-oxo-7,8-dihydro-β-ionone-3-O-β-d-glucopyranoside (1), (3S)-3-hydroxy-4-oxo-β-ionone-3-O-β-d-glucopyranoside (2), an apocarotenoid glucoside named equiseoside A (3) and an unusual aromatic compound with a glucose-fused skeleton named equiseoside B (4), together with 35 known compounds (5–39) were isolated from the aerial parts of Equisetum sylvaticum. The structures of these compounds were elucidated by spectroscopic methods, including 1D and 2D NMR, IR, CD, and HR–MS.

Graphical abstract

中文翻译：

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木贼地上部分的四种新糖苷

两种先前未描述的巨豆苷，( 3S )-3-羟基-4-氧代-7,8-二氢-β-紫罗兰酮-3- O -β- d-吡喃葡萄糖苷( 1 )，( 3S )-3-羟基-4-氧代-β-紫罗兰酮-3- O -β- d-吡喃葡萄糖苷 ( 2 )，一种名为木犀草苷 A ( 3 ) 的类胡萝卜素葡萄糖苷和一种具有葡萄糖融合骨架的不寻常芳香化合物，名为木犀草苷 B ( 4 )，一起从木贼的地上部分中分离出35 种已知化合物 ( 5 – 39 ). 这些化合物的结构通过光谱方法阐明，包括 1D 和 2D NMR、IR、CD 和 HR-MS。

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