Ee G, Lim S, Lim C, Dzulkefly K. Alkaloids and Carboxylic Acids from Piper nigrum. ajc [Internet]. 2010 Mar. 30 [cited 2024 Jul. 16];20(8):5931-40. Available from: https://asianpubs.org/index.php/ajchem/article/view/13041