Chemical composition and biological activity of a new type of Brazilian propolis: red propolis - Alencar, Severino Matias de; Oldoni, Tatiane Luiza Cadorin; Castro, M. L.; Cabral, I. S. R.; Costa Neto, Cláudio Miguel; Cury, J. A.; Rosalen, P. L.; Ikegaki, M. (Journal of Ethnopharmacology, 2007)