HUSSAIN, Khalid; ISMAIL, Zhari; SADIKUN, Amirin. High Performance Thin-Layer Chromatography Method for Quantification of Betulinic Acid in Extracts of Leaves of Orthosiphon stamineus Benth. Asian Journal of Chemistry, [S. l.], v. 23, n. 3, p. 977–979, 2010. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/16072. Acesso em: 9 jul. 2024.