ISOLASI β-AMIRIN DARI KULIT BATANG PULAI BASUNG (Alstonia spatulata Bl.). JPFI [Internet]. 2015 Sep. 1 [cited 2024 Oct. 6];4(1):1-5. Available from: http://ejournal2.stifar-riau.ac.id/index.php/jpfi/article/view/34