Antioxidant and in vitro photoprotective activity of the crude extract and fractions from Merostachys pluriflora Munro ex E.G. Camus Culms - Wróblewska, Katarzyna Barbara; Guaratini, Maria Tereza Grambone; Baby, André Rolim; Moreno, Paulo Roberto Hrihorowitsch (Simpósio de Plantas Medicinais do Brasil, 2018)