title: Isotheasaponins B1-B3 from Camellia sinensis var. sinensis tea leaves.
abstract: Three saponins, isotheasaponins B1-B3, were isolated from the leaves of the tea plant Camellia sinensis var. sinensis, and their structures were determined to be theasapogenol B [beta-D-galactopyranosyl(1-->2)][beta-D-xylopyranosyl(1-->2)-alpha-L-arabinopyranosyl(1-->3)]-beta-D-gulcopyranosiduronic acid with two acyl groups by spectroscopic analysis.
authors.affiliation: Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan.
authors.forename: Keiko
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Teruya
authors.forename: Kiyotake
authors.initials: K
authors.lastname: Suenaga
authors.forename: Yoko
authors.initials: Y
authors.lastname: Matsui
authors.forename: Hideki
authors.initials: H
authors.lastname: Masuda
authors.forename: Hideo
authors.initials: H
authors.lastname: Kigoshi
mesh_terms: D001628:Beverages; D028241:Camellia sinensis / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D012503:Saponins / Q000737:chemistry*; D014315:Triterpenes / Q000737:chemistry
chemical_list: D012503:Saponins; D014315:Triterpenes; C514273:isotheasaponin B1; C514274:isotheasaponin B2; C514275:isotheasaponin B3; C018398:theasaponine