Novel diterpenes from the heartwood of Chamaecyparis obtusa var. formosana |
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| Authors: | Kuo Yueh-Hsiung Chen Chia-Hsien Chien Shih-Chang Lin Hsiu-Chuan |
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| Institution: | Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, ROC. yhkuo@ccms.ntu.edu.tw |
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| Abstract: | Two novel diterpenes, obtusanal B (1) and obtusadione (2), along with obtusanal A (3), obtunone (4), 12-hydroxy-6,7-secoabieta-8,11,13-triene-6,7-dial, 8,12-dihydroxydielmentha-5,9-diene-7,11-dione and myrcene, isolated from the heartwood of Chamaecyparis obtusa var. formosana, were characterized by spectroscopic means, including 2D-NMR techniques. Compounds 1 and 2 are 7(6-->2)abeoabietane and 14(8-->9)abeoabietane type diterpenes, respectively. Their biosyntheses were proposed. |
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