Xanthomicrol is the main cytotoxic component of Dracocephalum kotschyii and a potential anti-cancer agent

Xanthomicrol (5,4′-dihydroxy-6,7,8-trimethoxyflavone) isolated from Dracocephalum kotschyii leaf extract has potent and selective cytotoxic effect against a panel of human cancer cell lines and may be a potential anti-cancer agent.