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Six previously undescribed C17-guaianolides, a previously undescribed guaianolide alkaloid, and two previously undescribed guaianolides as well as 10 known guaianolides were obtained from an ethanol extract of Ainsliaea yunnanensis Franch. The chemical structures of all previously reported sesquiterpenoids were determined by extensive NMR spectroscopic analysis in combination with a modified Mosher's...
Three new sesquiterpenoids, 4α‐hydroxyeudesm‐11(13)‐en‐12‐yl 3‐methylbutanoate (1), diaspanolide E (2), and (13α)‐germacra‐1(10),4‐dien‐12,8α‐olid‐15‐oic acid (3), along with eight known sesquiterpenoids (4 – 11), were isolated from the aerial parts of Ainsliaea henryi. The chemical structures of compounds 1 – 3 were elucidated by spectroscopic analysis (1D‐, 2D‐NMR, MS and HR/MS). All isolates were...
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