TUYEN, Pham Nguyen Kim; DUY, Le Hoang; PHUNG, Nguyen Kim Phi. Four flavonoids from Hedyotis nigricans. <b>Vietnam Journal of Chemistry</b>, <i>[S. l.]</i>, v. 48, n. 5, 2012. DOI: 10.15625/2175. Disponível em: https://vjes.vast.vn/vjchem/article/view/2175. Acesso em: 10 mar. 2026.