“Isolation and Identification of Saponin Compounds from the Butanol Extract of Majapahit Leaves (Crescentia Cujete) Using Thin Layer Chromatography and Infrared Spectrophotometry”. 2018. Celebes Biodiversitas 1 (1): 1-6. https://ojs.unpatompo.ac.id/index.php/cb/article/view/558.