title: trans- and cis-linalool 3,6-oxide 6-O-beta-D-xylopyranosyl-beta-D-glucopyranosides isolated as aroma precursors from leaves for oolong tea.
abstract: New glycosidic aroma precursors (1 and 2) of the main volatile constituents, trans- and cis-linalool 3,6-oxides (linalool oxides I and II), were isolated from oolong tea leaves (Camellia sinensis var. sinensis cv. Maoxie). The isolation was guided by an enzymatic hydrolysis with acetone powder prepared from fresh tea leaves (cv. Yabukita) followed by GC or GC-MS analyses. Chromatographic purification of hot water extracts of the tea leaves on active charcoal, Amberlite XAD-2, and Sephadex LH-20 columns as well as HPLC gave two new glycosides, trans- and cis-linalool 3,6-oxide 6-O-beta-D-xylopyranosyl-beta-D-glucopyranosides (1 and 2).
authors.affiliation: Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, Japan.
authors.forename: J H
authors.initials: JH
authors.lastname: Moon
authors.forename: N
authors.initials: N
authors.lastname: Watanabe
authors.forename: K
authors.initials: K
authors.lastname: Sakata
authors.forename: A
authors.initials: A
authors.lastname: Yagi
authors.forename: K
authors.initials: K
authors.lastname: Ina
authors.forename: S
authors.initials: S
authors.lastname: Luo
mesh_terms: D000080462:Acyclic Monoterpenes; D002240:Carbohydrate Sequence; D002849:Chromatography, Gas; D008401:Gas Chromatography-Mass Spectrometry; D006027:Glycosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D039821:Monoterpenes; D009812:Odorants / Q000032:analysis*; D018515:Plant Leaves / Q000737:chemistry*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013237:Stereoisomerism; D013662:Tea / Q000737:chemistry*; D013729:Terpenes / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D000080462:Acyclic Monoterpenes; D006027:Glycosides; D039821:Monoterpenes; D013662:Tea; D013729:Terpenes; C090216:linalool 3,6-oxide 6-O-xylopyranosylglucopyranoside