Four Eremophil-9-en-8-one Derivatives from Cremanthodium stenactinium Samples Collected in China

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Bisabolane, Oplopane, and Lignan Constituents of Cremanthodium campanulatum Collected in China

The chemical constituents in the roots of 3 Cremanthodium campanulatum Diels(Asteraceae) samples collected in Yunnan and Sichuan Provinces, China, were chemically investigated. A total of 8 bisabolane-type sesquiterpenoids, 2 of which were new, and anew oplopane-type sesquiterpenoid, along with a new lignan were isolated and their structures elucidated based on spectroscopicanalyses. This is the first report on the chemical study of C. campanulatum

Chemical constituents of hybrids of Ligularia cyathiceps and L. lamarum/L. subspicata collected in China: Structures of subspicatins M, N, O1, and O2, and related compounds

Three natural hybrids and an introgressed individual of Ligularia were evaluated based on a combination of morphology, root chemicals, and nucleotide sequences of evolutionally neutral regions to understand the chemical outcomes of hybridization and introgression. Six previously undescribed eremophilane sesquiterpenes were isolated from hybrids between L. cyathiceps and L. lamarum/L. subspicata, and benzofurans were isolated from L. subspicata for the first time. Their structures were elucidated based on spectroscopic analyses. Some compounds produced by hybrids have not been detected in either parental species, indicating that the metabolic profile was altered by hybridization and introgression