title: NMR spectral assignments of isoprenylated flavanones from Sophora tonkinensis.
abstract: The phytochemical investigation of extracts from the roots of Sophora tonkinensis yielded three new isoprenylated flavanones, the tonkinochromanes F (2), G (3), and H (5), along with four known compounds. Structural elucidation of the compounds were established on the basis of spectral data, particularly by the use of 1D NMR and several 2D shift-correlated NMR pulse sequences ((1)H-(1)H COSY, HSQC, HMBC, and ROESY).
authors.affiliation: School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, PR China.
authors.forename: Xing-Nuo
authors.initials: XN
authors.lastname: Li
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Lu
authors.forename: Guang-Tong
authors.initials: GT
authors.lastname: Chen
authors.forename: Hai-Xia
authors.initials: HX
authors.lastname: Yan
authors.forename: Na
authors.initials: N
authors.lastname: Sha
authors.forename: Shu-Hong
authors.initials: SH
authors.lastname: Guan
authors.forename: Min
authors.initials: M
authors.lastname: Yang
authors.forename: Hui-Ming
authors.initials: HM
authors.lastname: Hua
authors.forename: Li-Jun
authors.initials: LJ
authors.lastname: Wu
authors.forename: De-An
authors.initials: DA
authors.lastname: Guo
mesh_terms: D002247:Carbon Isotopes; D044950:Flavanones / Q000737:chemistry* / Q000302:isolation & purification; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000379:methods* / Q000592:standards*; D008968:Molecular Conformation; D018517:Plant Roots / Q000737:chemistry; D011522:Protons; D012015:Reference Standards; D029909:Sophora / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D002247:Carbon Isotopes; D044950:Flavanones; D005419:Flavonoids; D011522:Protons; C461819:sophoranone