[1] Univ Estadual Campinas, Inst Chem, Lab Synth Nat Prod & Drugs, BR-13083970 Campinas, SP, Brazil
[2] Inst Quim UFF, Xray Diffract Lab, Niteroi, RJ, Brazil
[3] Univ Estadual Campinas, Inst Chem, Lab Phys Organ Chem, BR-13083970 Campinas, SP, Brazil
[4] Univ Estadual Campinas, Inst Chem, Lab Struct Biol & Crystallog, BR-13083970 Campinas, SP, Brazil