Sulman L. Isolation of piperine from black pepper (Piper nigrum) in the provision of standard compounds for natural chemical practice and research activities. J. Pijar.MIPA [Internet]. 2021 Nov. 30 [cited 2024 Jul. 22];16(5):683-7. Available from: http://jurnalfkip.unram.ac.id/index.php/JPM/article/view/2981