Abstract
Four new N-contained iridoid glycosides, lonijapospiroside A (1), l-phenylalaninosecologanin B (2), l-phenylalaninosecologanin C (3), and dehydroprolinoylloganin A (4), were isolated from the flower buds of Lonicera japonica Thunb. Their structures were established on the basis of UV, IR, MS, and NMR spectral data.
Acknowledgments
This research program was financially supported by National Science and Technology Project of China (No. 2009ZX09311-004) and The State Key Laboratory of Bioactive Substances and Function of Natural Medicine.