Biomimetic oxidation studies of monensin A catalyzed by metalloporphyrins: identification of hydroxyl derivative product by electrospray tandem mass spectometry - Sousa Júnior, José Nerí; Rocha, Bruno A.; Assis, Marilda das Dores; Peti, Ana P. F.; Moraes, Luiz Alberto Beraldo de; Iamamoto, Yassuko; Gates, Paul J.; Oliveira, Anderson Rodrigo Moraes de; Lopes, Norberto Peporine (Revista Brasileira de Farmacognosia, 2013)