title: Two new flavonol glycosides from the Tibetan medicinal plant Aconitum tanguticum.
abstract: Two new flavonol glycosides characterized as quercetin 3-O-α-l-rhamnopyranosyl-(1 → 2)-[β-d-glucopyranosyl-(1 → 3)-α-l-(4-O-trans-p-coumaroylrhamnopyranosyl)-(1 → 6)]-β-d-galactopyranoside-7-O-α-l-rhamnopyranoside (1) and kaempferol 3-O-α-l-rhamnopyranosyl-(1 → 2)-[β-d-glucopyranosyl-(1 → 3)-α-l-(4-O-trans-p-coumaroyl rhamnopyranosyl)-(1 → 6)]-β-d-galactopyranoside-7-O-α-l-rhamnopyranoside (2), together with two known flavonol glycosides quercetin 3-O-α-l-rhamnopyranosyl-(1 → 2)- [α-l-rhamnopyranosyl-(1 → 6)]-β-d-galactopyranoside-7-O-α-l-rhamnopyranoside (3) and kaempferol 3-O-α-l-rhamnopyranosyl-(1 → 2)-[α-l-rhamnopyranosyl-(1 → 6)]-β-d-galactopyranoside-7-O-α-l-rhamnopyranoside (4), were isolated from the whole plant of Aconitum tanguticum (Maxim.) Stapf. The structures of the new compounds were elucidated by spectroscopic methods, and the total (1)H and (13)C NMR chemical shifts were assigned.
authors.affiliation: Institute of Chinese Materia Medica, China Academy of Chinese Medicine Sciences, Beijing, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Xu
authors.forename: Xiao
authors.initials: X
authors.lastname: Zhang
authors.forename: Li-Mei
authors.initials: LM
authors.lastname: Lin
authors.forename: Chun
authors.initials: C
authors.lastname: Li
authors.forename: Zhi-Min
authors.initials: ZM
authors.lastname: Wang
authors.forename: Yong-Ming
authors.initials: YM
authors.lastname: Luo
mesh_terms: D031841:Aconitum / Q000737:chemistry*; D044948:Flavonols / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D044949:Kaempferols; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D011794:Quercetin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000302:isolation & purification; D018609:Tibet
chemical_list: D044948:Flavonols; D006027:Glycosides; D044949:Kaempferols; C583695:kaempferol 3-O-alpha-L-rhamnopyranosyl-(1-2)-(beta-D-glucopyranosyl-(1 -3)-alpha-L-(4-O-trans-p-coumaroyl-rhamnopyranosyl)-(1-6))-beta-D-galactopyranoside-7-O-alpha-L-rhamnopyranoside; C583694:quercetin 3-O-alpha-L-rhamnopyranosyl-(1-2)-(beta-D-glucopyranosyl-(1-3)-alpha-L-(4-O-trans-p-coumaroylrhamnopyranosyl)-(1-6))-beta-D-galactopyranoside-7-O-alpha-L-rhamnopyranoside; D011794:Quercetin