Evidences of free radical production during umbelliferone metabolization by human neutrophil myeloperoxidase - Kabeya, Luciana Mariko; Fuzissaki, Carolina Nakau; Azzolini, Ana Elisa Caleiro Seixas; Lopes, J. L. C.; Naal, Zeki; Ferreira, Ana Maria da Costa; Lucisano-Valim, Yara Maria (Free Radicals and Antioxidants; Meeting of the Society for Free Radical Biology and Medicine, 2009)