Research Article

Bioactive Components of Chinese Propolis Water Extract on Antitumor Activity and Quality Control

Figure 1

HPLC chromatograms of the crude Chinese propolis water extract (CPWE) and the chemical structure of the eleven components. I: caffeic acid, II: ferulic acid, III: isoferulic acid, IV: 3,4-dimethoxycinnamic acid, V: pinobanksin, VI: caffeic acid benzyl ester, VII: caffeic acid phenethyl ester, VIII: apigenin, IX: pinocembrin, X: chrysin, and XI: galangin.
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