New polyacetylenes from <i>Echinophora cinerea</i> (Boiss.) Hedge <i>et</i> Lamond

<p><i>Echinophora cinerea</i> aerial parts are used in folk medicine to cure gastric diseases and as a food seasoning in cheese and yogurt. Besides several pharmacological effects have been assigned to <i>Echinophora</i> spp., there is no phytochemical investigation on this genus other than our previous publication on flavonoids. An acetone extract of <i>E. cinerea</i> afforded three new (<b>1–3</b>) polyacetylenes, one rare monoterpenoid glycoside as verbenone-5-<i>O</i>-<i>β</i>-D-glycopyranoside (<b>4</b>) and one prenylated coumarin as osthol (<b>5</b>). The structures of all new compounds were elucidated using modern spectroscopic methods, including 2D NMR and mass analyses. The potency of the compounds to induce cell death was determined on SKNMC, PC3 and MCF-7 cell lines using MTT method in which compounds <b>1</b> and <b>2</b> showed moderate cytotoxic effects, especially against PC3 cells.