Chemical Constituents and LC-profile of Fresh Formosan Lonicera japonica Flower Buds

I-Wen Lo, Yuan-Bin Cheng, Yi-Jin Hsieh, Tsong-Long Hwang, Deng-En Shieh, Fang-Rong Chang, Yang-Chang Wu
Natural Product Communications 2016, 11 (1): 1-4
One new secoiridoid glucoside, ethylsecologanin dimethyl acetal (1), along with 15 known compounds, comprising six iridoid glucosides (2-7), six flavonoids (8-13), two sterol glucosides (14 and 15), and chlorogenic acid (16) were isolated from the flower buds of Formosan Lonicera japonica. The structures of these isolates were determined on the basis of mass and spectroscopic analyzes. In addition, the chemical profiles of fresh Formosan honeysuckle buds and the dried Chinese one were compared by HPLC with a PDA detector. The calibration curve of the active component, chlorogenic acid, was also provided. As a result of the constituent similarity, Formosan L.japonica can be an alternative to the Chinese honeysuckles.

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