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Abstract
A new cucurbitacin, picfeltarraenone II (1) as well as four known cucurbitacins, picfeltarraegenin I (2), picfeltarraenin IA (3), picfeltarraenin IB (4), and picfeltarraenin IV (5), have been isolated and characterized from the whole plant of Picria fel-terrae. The purity of picfeltarraenin IA has been determined by TLC and HPLC.
Acknowledgements
The authors are grateful to Professor Sun Handong, member of the Chinese Academy of Sciences, Dr Xuemei Niu and Quanbin Han (Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, China) for their help on this paper.