A New Lupane-Type Triterpenoid Saponin from Lonicera macranthoides
A new lupane-type triterpenoid saponin, named lonimacranthoside A1, was isolated from the flower buds of Lonicera macranthoides. The structure of lonimacranthoside A1 was elucidated as 3β-O-β-D-glucopyranosyl-(1 → 4)-β-D-glucopyranosyl-(1 → 3)-α-L-rhamnopyranosyl-(1 → 2)-α-L-arabinopyranosyl-23-hydroxy-lup-20(29)-en-28-oic acid 28-O-β-D-glucopyranosyl-(1 → 6)-β-D-glucopyranosyl ester (1) on the basis of spectral data and chemical evidence. This is the first reported occurrence of a lupane-type saponin in the plant.
KeywordsLonicera macranthoides Caprifoliaceae lupane-type saponin lonimacranthoside A1
This study was financially supported by the National Key Technologies R&D Program of China during the 11th Five-Year Plan Period (No. 2009ZX09103-397), Industry-Academy Cooperation Innovation Fund Projects of Jiangsu Province (No. BY2012210), Jiangsu Province Special Foundation for Scientific and Technological Achievement Transformation (No. BA2011001), and the Open Fund of Jiangsu Key Laboratory for Bioresources of Saline Soils (No. JKLBS2012006).
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