“…Cirsium species contain a variety of natural products including flavonoids, phenolic acids, lignans, sesquiterpenoids, triterpenoids, sterols, alkaloids, acetylenes, polyacetylenes, hydrocarbons, and a few other compounds [ 7 ]. Flavonoids and their glycosides are the main secondary metabolites of Cirsium species [ 6 ]. The compounds isolated from Cirsium species and extracts show many different biological activities including antimicrobial, antioxidant, antidiabetic, anti-inflammatory, vasorelaxant, astringent, hepatoprotective, and anticancer activities [ 8 ].…”