Figure 1.

The HPLC chromatograms of the phenolic compounds in Gynura procumbens. The blue line in (A) is the original chromatogram at the beginning of the Gynura procumbens, while the orange line is the chromatogram after reacting with DPPH. The blue line in (B) is a chromatogram of the phenolic compound after reacting with activated COX-2, while the orange line is the chromatogram after reacting with inactivated COX-2. The detected compounds at the 284nm wavelength are chlorogenic acid (1), oxypeucedanin (2), isoimperatorin (3), indol-3-carboxylic acid (4), kynurenic acid (5), caffeic acid (6), coumaric acid (7), lutein (8) and luteolin (9).