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Two polyketides, stemonones A (1) and B (2) with new skeletons, were isolated from the roots of Stemona tuberosa. Their absolute structures were fully characterized by comprehensive spectroscopic analyses and comparison of experimental electronic circular dichroism (ECD) spectra with calculated ones. The plausible biosynthetic pathways for 1 and 2 were also proposed. Anti-inflammatory assay confirmed...
One new 9,10-seco-abietane derivative, crotontomentosin A (1), four new abietane-type diterpenoids, crotontomentosins B–E (2–5), one new ent-halimane-type diterpenoid, crotontomentosin F (6), along with five known diterpenoids (7–11) and one known sesquiterpenoid (12) were obtained from the twigs and leaves of Croton caudatus Geisel. var. tomentosus Hook. The structures of the compounds were established...
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