Evidences of free radical production during umbelliferone metabolization by hurman neutrophil myeloperoxidase - Kabeya, L. M.; Fuzissaki, C. N.; Azzolini, Ana Elisa Caleiro Seixas; Lopes, João Luís Callegari; Naal, Zeki; Ferreira, Ana Maria da Costa; Lucisano-Valim, Yara Maria (Meeting of The SFRBM - South American Group, 2009)