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Analytical HPLC chromatograms of the oligomeric procyanidin (PC) constituents in crude apple polyphenols (AP) mixture (No. 7) and those in preparative HPLC fractions (No. 1–6) obtained from the AP mixture. Both conditions of the preparative and analytical HPLCs are described in the Section 4.2. The oligomeric PC constituents in the fractions 1–6 are as follows; No. 1 (i.e., fr.1): monomer; No. 2: dimer; No. 3: trimer; No. 4: tetramer; No. 5: pentamer; No. 6: greater than pentamer.
