Sesquiterpene coumarins from Ferula szowitsiana and in vitro antileishmanial activity of 7-prenyloxycoumarins against promastigotes. - Iranshahi,M.; Arfa,P.; Ramezani,M.; Jaafari,M.R.; Sadeghian,H.; Bassarello,C. (Phytochemistry, 2007)