Studies on the Constituents of the Bark of Chamaecypairs formosensis Ma-tsum
Date Issued
2007
Date
2007
Author(s)
Kuo, Che-Hung
DOI
zh-TW
Abstract
Abstract
Chamaecypais formosensis Matsum. is indigenous in the north and central parts of
Taiwan at 1000~3000 meters,often forming pure stands or mixed with Chamaecypairs
obtusa var. formosana. This trees can attain 1500 year of age,and sometime it can live
about 4000 year old. Their longevity is attributable to the tree’s inherent ability to
withstand erosion and prevent the growth of bacteria on its bark.
The methanol extract from the bark of Chamaecypairs formosensis Matsum. was
concentrated to give residue which was partitioned between ethyl acetate and water.
The ethyl acetate layer was separated by column chromatography on silica gel and
HPLC afforded forty compounds. Of these compounds, six compound are new and
one compound are isolated for the first time from natural sources.
The structure of these compounds were elucidated by comparison of their spectral
data with related literature values and spectroscopic methods including 1D and 2D
NMR.
Diterpenoid
D1*: 8β,20-Dihydroxyabieta-9(11),13-dien-12-one
D8*: (12S)-Hydroxylabda-8(17),13(E)-dien-12,19-dionic acid
D12*: 13-Acetyl-8β-hydroxy-16-norabieta-19-oic acid
D20*: 12-Oxo-15-hydroxylabda-8(17),13(E)-dien-19-oic acid
D22*: Labda-8(17),11(E),13(E)-triene-15,19-dioic acid
D26**: 12-Methoxy-7-oxoabieta-8,11,13-trien-20-oic acid
Sesquiterpenoid
S1*:11-Hydroxydriman-8(12)-en-14-oic acid
Subjects
紅檜皮部之化學成分研究
Studies on the Constituents of the Bark of Chamaecypairs formosensis Ma-tsum
Type
thesis
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