2007•International Symposium on Eucommia ulmoidesOpen access
Seasonal Variations of Eucommiol in Eucommia ulmoides Leaves and Changes in the Amounts of Eucommiol and Aucubin in the Cortexes
Qing‐Ming Che, Jinnian Peng, Yinquan Su, Juane Dong
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Abstract
Methods: The amounts of eucommiol and aucubin in the leaves and barks of Eucommia ulmoides were detected by HPLC.Results: (1) The amount of eucommiol in E. ulmoides leaves peaked in mid-September (1.450%); the amount was lowest in May (0.133%). (2) Changes in the amounts of eucommiol and aucubin in the cortexes of E. ulmoides were determined. (3) A possible biotransformation pathway that converts aucubin to eucommiol in the leaves and barks of E. ulmoides was suggested.
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