Constituents and antiproliferative activity of extracts from leaves of Croton macrobothrys - Motta, Lucimar Barbosa; Furlan, Cláudia Maria; Santos, Deborah Yara Alves Cursino dos; Salatino, Maria Luiza Faria; Duarte-Almeida, Joaquim Maurício; Negri, Giuseppina; Carvalho, João Ernesto de; Ruiz, Ana Lúcia T. G; Cordeiro, Ines; Salatino, Antonio (Revista Brasileira de Farmacognosia = Brazilian Journal of Pharmacognosy, 2011)