Ferlapioside: a new bromine substituted iridoid glycoside from the roots of Korovin.

One new bromine substituted iridoid glycoside, ferlapioside (), was isolated from the roots of Korovin, together with 10 known ones including seven iridoid glycosides (-) and three sesquiterpene lactones (-). Their structures were elucidated by extensive spectroscopic analyses, e.g. 1D and 2D-NMR, HR-ESI-MS, IR, UV, CD techniques, and comparison with literature values. Compounds and - were evaluated for inhibitory activity against LPS-induced NO production in the RAW 264.7 cells and the cytotoxic activity against five human cancer cell lines (HL-60, A549, SMMC-7721, MDA-MB-231 and SW480). However, none of them exhibit significant anti-inflammatory and cytotoxic activity. This study will provide a scientific basis and reference for the further development and utilisation of plants.