Chemical constituents from Piper betle L. Var Nigra (Piperaceae). Journal of Tropical Pharmacy and Chemistry , [S. l.], v. 5, n. 3, p. 229–232, 2021. DOI: 10.30872/j.trop.pharm.chem.v5i3.208. Disponível em: https://jtpc.ff.unmul.ac.id/index.php/jtpc/article/view/208. Acesso em: 23 oct. 2025.