Structure Identification: |
Food & Fermentation Industries, 2007, 33(7):162-166. | A Comparative Study on Chemical Compositions of Chinese Propolis and Poplar Resin[Reference: WebLink] | METHODS AND RESULTS: Chemical compositions of the ethanolic extracts of 30 propolis samples from Shaanxi, Henna, Hubei, Hebei, Liaoning, Zhejiang Shandong and Gansu provinces and two poplar resin samples were determined using reversed-phase high-performance liquid chromatography (RPHPLC)-mass spectrometry with photodiode array detector.
CONCLUSIONS:
The results showed that chemical compositions of the tested propolis samples were the same and pinocembrin, chrysin and galangin were the dominant flavonoids in the tested propolis and poplar resins. In addition, phenethyl caffeate, benzyl caffeate, Benzyl p-coumarate, 2-methyl-2-butenyl ferulate, piobanksin 3-propanoate, 2-methyl-2-butenyl p-coumarate, cinnamyl caffeate, trans-ferulic acid and 2-methyl-2-butenyl ferulate were also identified both in chinese propolis and poplar resins. |
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