Three new tetrahydrobenzofuran derivatives from Ferula sinkiangensis K.M.Shen and their cytotoxic activities

Phytochemical investigation the resins of Ferula sinkiangensis K.M.Shen yielded three new tetrahydrobenzofuran derivatives named as Sinkiangensis A-C (1–3). The structures of the new compounds were elucidated by analysis of their NMR, HRMS, and ECD spectra, and the absolute configurations were established through the comparison of experimental and calculated ECD spectra. Compound 3 exhibited moderate antitumor activities against AGS cancer cell with IC50 values of 15.6 µM. Moreover, assays demonstrated that compound 3 could induce AGS cancer cell apoptosis.