Fragmentation studies of deprotonated 2-acylamino-1,4-naphtoquinone derivatives by ESI-MS/MS - Vessecchi, Ricardo; Carollo, Carlos A.; Lopes, Jose Norberto Callegari; Lopes, Norberto Peporine; Crotti, Antonio E. M.; Galembeck, Sérgio Emanuel (Congresso BrMass, 2007)