Comparison of Spectrophotometric Methods of Total Flavonoid Assay Based on Complex Formation with Aluminum Chloride as Applied to Multicomponent Herbal Drug Angionorm. Journal of Pharmaceutical Negative Results, [S. l.], v. 9, n. 1, p. 1–7, 2018. Disponível em: https://pnrjournal.com/index.php/home/article/view/119.. Acesso em: 19 jun. 2026.