[1] Univ Sao Paulo, Ribeirao Preto Med Sch, Dept Biochem & Immunol, BR-14049 Ribeirao Preto, Brazil
[2] Univ Sao Paulo, Fac Pharmaceut Sci Ribeirao Preto, Dept Clin Toxicol & Bromatol Anal, Ribeirao Preto, Brazil
[3] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, Dept Chem, Ribeirao Preto, Brazil
[4] Univ Sao Paulo, Fac Pharmaceut Sci Ribeirao Preto, Dept Phys & Chem, Ribeirao Preto, Brazil