Abstract
Comprehensive SummarySpirolindemers A and B, unprecedented lindenane sesquiterpenoid dimer (1) and trimer (2) equipped with oxaspiro[4.5]decane unit, were discovered from the medicinal plant Chloranthus henryi. Their structures including absolute configurations were achieved by HRMS, NMR, ECD, X‐ray diffraction analyses, and quantum chemical calculations. Biogenetically, hetero‐ and homo‐Diels‐Alder additions may dominate the formation of oxaspiro[4.5]decane and spiro[4.5]decane skeletons, respectively. Compound 1 showed anti‐inflammatory activity by inhibiting the expression of iNOS and COX‐2.
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