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Four novel rearranged calamenene sesquiterpenoids, 1–4, and two eudesmane sesquiterpenoids, 5 and 6, were isolated from the Chinese liverworts Chiloscyphus polyanthus (L.) and Bazzania japonica S. (Lac.) Lindb. Their structures and relative configurations were determined by chemical derivatization and in‐depth spectroscopic methods, especially 1D‐ and 2D‐NMR as well as HR‐MS analyses.
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Ma et al. (2007) studied this question.
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