A simple defined medium for the production of true diketopiperazines in Xylella fastidiosa and their identification by ultra-fast liquid chromatography-electrospray ionization ion trap mass spectrometry - Silva, Michelli Massaroli da; Andrade, Moacir dos Santos; Bauermeister, Anelize; Merfa, Marcus Vinícius; Forim, Moacir Rossi; Fernandes, João Batista; Vieira, Paulo Cezar; Silva, Maria Fátima das Graças Fernandes da; Lopes, Norberto Peporine; Machado, Marcos Antônio; Souza, Alessandra Alves de (Molecules, 2017)