CapillinCapillin is a toxic naturally occurring organic compound with the chemical formula. The structure contains acetophenone and a polyyne portion, conjugated together as an ynone.Chemical taxonomyCapillin is found in the essential oil of a number of Artemisia species, including Artemisia monosperma and Artemisia dracunculus. The substance was initially isolated from Artemisia capillaris in 1956.ApplicationsCapillin is a biologically active substance. It has strong antifungal activity, and it is possibly antitumoral. Capillin exhibits cytotoxic activity and could cause apoptosis of certain human tumor cells.