AHMAD, F.B.H.; GHAFFARI, M.; BASRI, M.; ABDUL RAHMAN, M.B. Spectroscopic Data of 3-O-Acetyl-betulinic Acid: An Antitumor Reagent. Asian Journal of Chemistry, [S. l.], v. 22, n. 4, p. 3186–3192, 2010. Disponível em: https://asianpubs.org/index.php/ajchem/article/view/11531. Acesso em: 23 jul. 2024.