title: Senna alata leaves are a good source of propelargonidins.
abstract: Proanthocyanidins (PA) in Senna alata leaves were investigated by thiolysis with benzyl mercaptan, LC-MS and NMR and consisted of almost pure propelargonidins with <6% procyanidins, had B-type linkages and a mean degree of polymerisation of three. Epiafzelechin was the major flavan-3-ol subunit (>94%) and epicatechin a minor constituent (6.4%) in residual PA and mainly detected as an extension unit.
authors.affiliation: a Chemistry and Biochemistry Laboratory, School of Agriculture, Policy and Development , University of Reading , Reading , UK.
authors.forename: Aina
authors.initials: A
authors.lastname: Ramsay
authors.affiliation: a Chemistry and Biochemistry Laboratory, School of Agriculture, Policy and Development , University of Reading , Reading , UK.
authors.forename: Irene
authors.initials: I
authors.lastname: Mueller-Harvey
mesh_terms: D005419:Flavonoids / Q000032:analysis / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D018515:Plant Leaves / Q000737:chemistry; D044945:Proanthocyanidins / Q000032:analysis* / Q000737:chemistry; D029846:Senna Plant / Q000737:chemistry*
chemical_list: D005419:Flavonoids; D044945:Proanthocyanidins
keywords: LC–MS; NMR; Senna alata; proanthocyanidins; propelargonidins; thiolysis;  Cassia alata