Anti-cancer stem cell activity of a sesquiterpene lactone isolated from Ambrosia arborescens and of a synthetic derivative - Sotillo, W S; Villagomez, R; Smiljanic, S; Huang, X; Malakpour, A; Kempengren, S; Rodrigo, G; Almanza, G; Sterner, O; Oredsson, S (PLoS One, 2017)