Studies on the constituents of the bark of Chamaecyparis obtusa var. formosana
Date Issued
2005
Date
2005
Author(s)
Ko, Chien-Ming
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 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 separated by column chromatography on silica gel, preparative thin layer chromatography and high performance liquid chromatography (HPLC) to give forty-five compounds. Of these compounds, eight of them are new compounds. Among the isolated components, there are one monoterpenoid, two sesquiterpenoids, thirty-five diterpenoids, five dimers, one steroid, the other one do not belong to any of the above categories.
The known compounds were identified by spectral analysis and compared with those reported in literatures or authentic samples. The structures of new compounds were elucidated by spectral evidence including one-dimension and two-dimension spetral analysis.
Subjects
扁柏
皮部
Chamaecyparis obtusa var. formosana
bark
Type
thesis
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