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Extracted ion chromatogram (EIC) from the ESI positive analysis of Procyanidin monomers and dimers (A); trimers, tetramers, and pentamers (B); flavonols (C); methylxanthines (D) and free aminoacids (E). C, catechin; EC, epicatechin, B1, B2, B3, and B5 procyanidin dimers; t, procyanidin trimer; T, procyanidin tetramer; p, procyanidin pentamer; TB, theobromine; CF, caffeine; Phe, l-phenylalanine; Trp, l-tryptophan.
