title: Phytochemical studies of Rehmannia glutinosa rhizomes.
abstract: 2,4-Dimethoxy-2-methyl-6H-pyran-3-one (1), a hitherto unknown natural product, and the calcium salt of rehmapicroside (2) have been isolated from rhizomes of the Vietnamese variety of Rehmannia glutinosa Libosch together with a series of known compounds: norcarotenoids (3-5), 2-formyl-5-hydroxy-methylfurane (6), the iridoid rehmaglutin D (7), iridoid glycosides (8-12) and phenylethyl alcohol glycosides (13-17). Their structures were determined by mass and NMR spectroscopy.
authors.affiliation: Institute of Chemistry, National Center for Sciences and Technology, Hanoi, Vietnam.
authors.forename: N T H
authors.initials: NT
authors.lastname: Anh
authors.forename: T V
authors.initials: TV
authors.lastname: Sung
authors.forename: K
authors.initials: K
authors.lastname: Franke
authors.forename: L A
authors.initials: LA
authors.lastname: Wessjohann
mesh_terms: D002240:Carbohydrate Sequence; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D010936:Plant Extracts / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D011753:Pyrones / Q000737:chemistry*; D032267:Rehmannia / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: C477663:2,4-Dimethoxy-2-methyl-6H-pyran-3-one; D010936:Plant Extracts; D011753:Pyrones