Clusiaxanthone and tocotrienol series from Clusia pernambucensis and their antileishmanial activity - Silva, Everton M.; Araújo, Renata M.; Freire-Filha, Lindomar G.; Silveira, Edilberto R.; Lopes, Norberto Peporine; Paula, José Elias de; Braz Filho, Raimundo; Espindola, Laila S. (Journal of Brazilian Chemical Society, 2013)