Apple (Malus pumila) procyanidins fractionated according to the degree of polymerization using normal-phase chromatography and characterized by HPLC-ESI/MS and MALDI-TOF/MS. - Shoji,T.; Masumoto,S.; Moriichi,N.; Kanda,T.; Ohtake,Y. (J Chromatogr A, 2006)