Antiproliferative activity and constituents of leaf extracts of Croton sphaerogynus Baill. (Euphorbiaceae) - Motta, Lucimar B; Furlan, Cláudia Maria; Santos, Deborah Yara Alves Cursino dos; Salatino, Maria Luiza Faria; Negri, Giuseppina; Carvalho, João E; Monteiro, Paula A; Ruiz, Ana Lúcia T. G; Caruzo, Maria B; Salatino, Antonio (Industrial Crops and Products, 2013)