Studies on the Constituents from of Chamaecyparis obtusa var. formosana Bark
Date Issued
2007
Date
2007
Author(s)
Lin, Wen-Wei
DOI
zh-TW
Abstract
Chamaecyparis obtusa var. formosana (bark) is indigenous in the central and north part of Taiwan at altitudes of 1500~2500 meters. The wood of this tree is one of the best building material in Taiwan.
The acetone extract from the bark of C. obtusa var. formosana was concentrated to give a residue, which was further separated by column chromatography on silica gel, preparative thin layer chromatography and high performance liquid chromatography (HPLC) to obtain forty-one compounds, including two monterpenoids, one sesquiterpenoids, thirty-three diterpenoids, two dimmers, two lignans, and others skelton compounds, which do not belonging to any of the above categories. Among these isolated compounds, seventheen compounds are new compounds.
The known compounds were identified by spectral analysis and compared with litertures data or authentic samples. The structures of new compounds were elucidated by spectral analysis including one-dimension and two-dimension NMR spetral analysis.
Subjects
扁柏
核磁共振
Chamaecyparis
NMR
Type
thesis
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