Trypanocidal activity of 5,6-dihydropyran-2-ones against free trypomastigotes forms of Trypanosoma cruzi - Fátima, Ângelo de; Marquissolo, Cilene; Albuquerque, Sérgio de; Carraro-Abrahão, Ana Amélia; Pilli, Ronaldo Aloise (European Journal of Medicinal Chemistry, 2006)