Fragmentation studies of protonated xanthophylls from marine organisms by accurate-mass electrospray tandem mass spectrometry - Carnevale Neto, Fausto; Guaratini, Thais; Costa-Lotufo, Letícia Veras; Colepicolo, Pio; Lopes, Norberto Peporine (Reunião Anual da Sociedade Brasileira de Química/SBQ, 2015)