New Lignans from the Roots of Taiwania cryptomerioides Hayata |
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| Authors: | Chiou‐Fung Chyu Yueh‐Hsiung Kuo |
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| Institution: | 1. Department of Chemistry, National Taiwan University, Taipei 106, Taiwan;2. Research Center of Food and Biomolecules, National Taiwan University, Taipei 106, Taiwan, (phone:+886‐233661671;3. fax: +886‐2‐23636359);4. College of Pharmacy, China Medical University, Taichung, 404, Taiwan;5. Agriculture Biotechnology Research Center, Academia Sinica, Taipei, 115, Taiwan |
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| Abstract: | The five new lignans designated 3′,4′‐de‐O‐methylenehinokinin ( 1 ), taiwaninolide ( 2 ), 8′‐hydroxysavinin ( 3 ), isoguamarol ( 4 ), and 4′‐O‐methylsalicifolin ( 5 ), as well as the new 4‐(3,4‐dimethoxybenzyl)dihydro‐3‐(4‐hydroxybenzyl)furan‐2(3H)‐one ( 6 ) were isolated from the roots of Taiwania cryptomerioides, besides the three known compounds hinokinin ( 8 ), savinin ( 9 ), and 3,4‐de‐O‐methylenehinokinin ( 7 ). The structures of the new constituents were elucidated through chemical and spectral studies. A compound previously isolated from the heartwood of Chamaecyparis obtusa var. formosana was assigned structure 1 ; however, this structure has now been revised to be 3,4‐de‐O‐methylenehinokinin ( 7 ). |
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| Keywords: | Lignans Taiwania cryptomerioides Taiwaninolide Isoguamarol Hinokinin 3′ 4′ ‐de‐O‐methylene‐ Savinin 8′ ‐hydroxy‐ Salicifolin 4′ ‐O‐methyl‐ |
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