Chen, F.-Z. et al. 2014. Antioxidant Activity and Antioxidant Mechanism of Brazilin and Neoprotosappanin from Caesalpinia sappan Lignum. Asian Journal of Chemistry. 26, 16 (Aug. 2014), 4979–4981. DOI:https://doi.org/10.14233/ajchem.2014.16282.