title: Saponins conjugated with 2,3-dihydro-2,5-dihydroxy-6-methyl-4H-pyran-4-one from Phaseolus coccineus.
abstract: From the hypocotyl of scarlet runner bean (Phaseolus coccineus), a new 2,3-dihydro-2,5,-dihydroxy-6-methyl-4H-pyran-4-one conjugated saponin, named soyasaponin alpha a, was isolated together with two known saponins, soyasaponin alpha g and beta g. Their structures were elucidated by 1H NMR and 13C NMR spectroscopy and chemical techniques.
authors.affiliation: Department of Applied Biological Chemistry, Faculty of Agriculture, Tohoku University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Yoshiki
authors.forename: J H
authors.initials: JH
authors.lastname: Kim
authors.forename: K
authors.initials: K
authors.lastname: Okubo
mesh_terms: D002240:Carbohydrate Sequence; D007887:Fabaceae / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D009828:Oleanolic Acid / Q000031:analogs & derivatives*; D010946:Plants, Medicinal; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; C089344:soyasaponin alpha a; C089345:soyasaponin alpha g; C089346:soyasaponin beta g; D009828:Oleanolic Acid