title: Glycosides of tricetin methyl ethers as chemosystematic markers in Stachys subgenus Betonica.
abstract: Nine species from the genus Stachys L. representing subgenera Stachys and Betonica were surveyed for flavonoid glycosides by means of HPLC coupled to diode-array detection and LC-APCI-MS. Those species belonging to subgenus Betonica were characterised by the presence of glycosides of tricetin methyl ethers, including a new derivative, which was isolated from S. scardica Griseb. and identified as tricetin 3',4',5' -trimethyl ether 7-O-beta-glucopyranoside by spectroscopic methods. This type of flavonoid was absent from species belonging to subgenus Stachys and can be considered as a chemosystematic marker for subgenus Betonica.
authors.affiliation: Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey TW9 3AB, UK.
authors.forename: Petar D
authors.initials: PD
authors.lastname: Marin
authors.forename: Renée J
authors.initials: RJ
authors.lastname: Grayer
authors.forename: Slavica
authors.initials: S
authors.lastname: Grujic-Jovanovic
authors.forename: Geoffrey C
authors.initials: GC
authors.lastname: Kite
authors.forename: Nigel C
authors.initials: NC
authors.lastname: Veitch
mesh_terms: D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002867:Chromones / Q000737:chemistry* / Q000302:isolation & purification; D004987:Ethers / Q000737:chemistry / Q000302:isolation & purification; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000235:genetics* / Q000302:isolation & purification; D013058:Mass Spectrometry / Q000379:methods; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D013045:Species Specificity; D013056:Spectrophotometry, Ultraviolet; D031366:Stachys / Q000737:chemistry* / Q000145:classification* / Q000235:genetics
chemical_list: D002867:Chromones; D004987:Ethers; D005419:Flavonoids; D006027:Glycosides; C469689:tricetin