Chemical constituents of Ferula seravschanica.

Phytochemical investigation of Ferula seravschanica afforded seven new compounds, including three new bicyclic-type sesquiterpene coumarins (1-3), two new monocyclic-type sesquiterpene coumarins (16-17), two new phenylpropanoids (23-24) as well as twenty-two known compounds (4-15, 18-22, and 25-29). The structures of new compounds were determined by HRESIMS, NMR, ECD calculations, and X-ray single-crystal diffraction analysis. Furthermore, crude EtOAc extract and separated fractions (F1-F12) possessed cytotoxic activity against four human tumor cell lines (HT-29, DU145, HeLa, and Jurkat). Subsequently, we examined Jurkat inhibitory activity of isolated compounds. Compound 12 significantly inhibited the proliferation of the leukemia cells with IC value of 2.50 μM.