A new flavone xyloside and two new flavan-3-ol glucosides from Juniperus communis var. depressa.
A new flavone xyloside, 1, and two new flavan-3-ol glucosides, 3 and 4, were isolated together with three known flavones, 2, 11, and 12, five known flavans, 5-9, and a known dihydrochalcone, 10, from the stems and leaves of Juniperus communis var. depressa (Cupressaceae) collected in Oregon, U.S.A., and their structures were determined on the basis of spectral evidence. A novel flavone nucleus such as that in 1 is seldom found in nature today, and new methylcatechin glucosides 3 and 4 are also rare in nature. In addition, we investigated the inhibitory activity of individual components, i.e., 8-11, and others, that were abundantly isolated from the same plant material for the Maillard reaction.
Iida
Naoki
N
Faculty of Pharmaceutical Sciences, Setsunan University, 45-1 Nagaotoge-cho, Hirakata, Osaka 573-0101, Japan.
Inatomi
Yuka
Y
Murata
Hiroko
H
Inada
Akira
A
Murata
Jin
J
Lang
Frank A
FA
Matsuura
Nobuyasu
N
Nakanishi
Tsutomu
T
D047309:Flavones / Q000737:chemistry*; D005960:Glucosides / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D018653:Juniperus / Q000737:chemistry*; D015416:Maillard Reaction; D015394:Molecular Structure; D013057:Spectrum Analysis
D047309:Flavones; D005960:Glucosides; D006027:Glycosides; C010807:xylosides