Phytochemical studies of Rehmannia glutinosa rhizomes.
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.
Anh
N T H
NT
Institute of Chemistry, National Center for Sciences and Technology, Hanoi, Vietnam.
Sung
T V
TV
Franke
K
K
Wessjohann
L A
LA
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
C477663:2,4-Dimethoxy-2-methyl-6H-pyran-3-one; D010936:Plant Extracts; D011753:Pyrones