Studies on the Chemical Constituents of the Bark of Cryptomeria japonica D. Don.
Date Issued
2006
Date
2006
Author(s)
Chen, Cheng-Chi
DOI
zh-TW
Abstract
Cryptomeria japonica (L. f.) D. Don., a member of the Taxodiaceae, is a protophyte in Mainland China and Japan. It was domesticated into Taiwan in 1906 and is distributed at altitudes of 500-1800 meters. It is a common building material.
The methanol extract from the bark of C. japonica was concentrated to give a residue which was partitioned between ethyl acetate and H2O. The ethyl acetate layer was separated by column chromatography on silica gel, preparative thin layer chromatography, flash column chromatography, and high performance liquid chromatography (HPLC) to give one hundred and seventy compounds. The known compounds were identified by IR, NMR, and Mass spectral analysis and comparison with authentic samples or those reported data in literatures. The structures of new compounds were further elucidated by 2D NMR spectral and chemical methods. Among these compounds, there are sixty four new compounds and two isolated compounds for the first time from natural sources. All these compounds belong to thirty two skeletons, in which, there are seven novel skeletons.
Subjects
柳杉
Cryptomeria japonica
Type
thesis