title: Characterisation of proanthocyanidins from black soybeans: isolation and characterisation of proanthocyanidin oligomers from black soybean seed coats.
abstract: Proanthocyanidin oligomers (dimers to tetramers) were isolated from black soybean seed coats, using Sephadex LH-20 column chromatography and reversed-phase preparative HPLC. The isolated oligomers consisted of only (-)-epicatechin units, which were linked through either 4β→8 or 4β→6 (B-type) bonds. Procyanidin B2, procyanidin C1, and cinnamtannin A2 were identified as the main compounds of the proanthocyanidin dimers, trimers, and tetramers, respectively.
authors.affiliation: Department of Research and Development, Fujicco. Co. Ltd., 6-13-4 Minatojima-nakamachi Chuo-ku, Kobe, Hyogo 650-8558, Japan. c-ito@fujicco.co.jp
authors.forename: Chiaki
authors.initials: C
authors.lastname: Ito
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Oki
authors.forename: Tadashi
authors.initials: T
authors.lastname: Yoshida
authors.forename: Fumio
authors.initials: F
authors.lastname: Nanba
authors.forename: Katsushige
authors.initials: K
authors.lastname: Yamada
authors.forename: Toshiya
authors.initials: T
authors.lastname: Toda
mesh_terms: D008968:Molecular Conformation; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D044945:Proanthocyanidins / Q000737:chemistry* / Q000302:isolation & purification; D012639:Seeds / Q000737:chemistry*; D013025:Glycine max / Q000737:chemistry*
chemical_list: D010936:Plant Extracts; D044945:Proanthocyanidins
keywords: Black soybean; Polyphenol; Proanthocyanidin