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Secoiridoid glycosides from Flos Lonicerae

BI Yue-feng, TIAN Ye, PEI Shan-shan, LIU Hong-min(New Drug Research & Development Centre, Zhengzhou University, Zhengzhou 450001, China)  
Objective To study the constituents in water-extracts from Flos Lonicerae. Methods Compounds were isolated and purified by using various column chromatography such as D101, Sephadex LH-20, and silica gel, etc. Their structures were identified on the basis of physical and spectral data. Results Seven secoiridoid glycosides were obtained and identified as vogeloside (Ⅰ), 7-epi-vogeloside (Ⅱ), secologanic acid (Ⅲ), sweroside (Ⅳ), secoxyloganin (Ⅴ), secologanoside (Ⅵ), (E)-aldosecologanin (Ⅶ). Conclusion Among them, compounds Ⅲ and Ⅵ are firstly obtained from the plants in Lonicera L. The structure of compound Ⅶ is rare in nature so far.
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