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. 2021 Oct 2;26(19):5998. doi: 10.3390/molecules26195998

Figure 4.

Figure 4

HPLC chromatogram of (A) 16 available polyphenol standards and (B) EAF from E. fragilis. Peak numbers correspond to chemical compounds gallic acid (retention time (Rt) = 2.76 min, peak 1), vanillic acid (Rt = 6.94 min, peak 2), caffeic acid (Rt = 9.34 min, peak 3), syringic acid (Rt = 10.23 min, peak 4), catechin (Rt = 17.52 min, peak 5), ferulic acid (Rt = 22.28 min, peak 6), p-coumaric acid (Rt = 26.23 min, peak 7), sinapic acid (Rt = 28.67 min, peak 8), chlorogenic acid (Rt = 33.81 min, peak 9), isoquercitrin (Rt = 40.06 min, peak 10), rutin (Rt = 44.95 min, peak 11), quercetol (Rt = 48.43 min, peak 12), luteolin (Rt = 52.76 min, peak 13), kaempferol (Rt = 55.11 min, peak 14), quercetin (Rt = 60.51 min, peak 15), and apigenin (Rt = 64.94 min, peak 16).