Chemical constituents from stems of Minasia alpestris (Gardner) H. Robinson - Keles, Larissa Costa; Gianasi, Fernanda Moreira; Souza, Rosemeire Cristina; Brito, Bruno Leonardo de; Turatti, Izabel Cristina Casanova; Lopes, João Luís Callegari; Lopes, Norberto Peporine; Cunha, Wilson Roberto; Crotti, Antônio Eduardo Miller (International Congress of Pharmaceutical Sciences (CIFARP), 2007)