Antileukemic effects of didemnum psammatodes (tunicata: ascidiacea) constituents - Takeara, Renata; Jimenez, Paula Christine; Wilke, Diego Veras; Moraes, Manoel Odorico de; Pessoa, Cláudia; Lopes, Norberto Peporine; Lopes, João Luís Callegari; Lotufo, Tito Monteiro da Cruz; Costa-Lotufo, Letícia Veras (Comparative Biochemistry and Physiology, 2008)