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HPLC chromatograms of phenolic extracts from P. guineense recorded at 280 nm: (A) Stem and (B) leaves (TR: 19.10: 3,4-OH-benzoic acid; 33.49: Apigenin; 25.67: Caffeic acid; 23.48: catechine; 29.43: Eugenol; 14.38; gallic acid; 25.11: O-coumaric; 21.91: OH-tyrosol; 30.52: P-coumaric acid. 42.19: quercetin; 29.45: rutin; 25.55: Syringic acid; 17.35: Theobromine; 21.77: Tyrosol and 25.27: Vanillic acid).
