Usman, U., Soekamto, N. H., Natsir, M., & Maulidiyah, M. (2020). Isolation of Natural Derivated Steroidal from Bark Stem of Melochia umbellata (Houtt) Stapf var. degrabrata K. Asian Journal of Chemistry, 32(4), 765–770. https://doi.org/10.14233/ajchem.2020.22414