Immunomodulatory effects of methoxylated flavonoids from two chromolaena species: structure-activity relationships - Taleb-Contini, Sílvia Helena; Kanashiro, Alexandre; Kabeya, Luciana Mariko; Polizello, Ana Cristina Morseli; Lucisano-Valim, Yara Maria; Oliveira, Dionéia Camilo Rodrigues de (Phytotherapy Research, 2006)