Efficient Synthesis of Novel 1-Substituted β- Carboline Derivatives via Pictet-Spengler Cyclization of 5-Hydroxy-L-Tryptophan. Mal. J. Fund. Appl. Sci. [Internet]. 2022 May 16 [cited 2026 Sep. 5];18(2):218-26. Available from: https://mjfas.utm.my/index.php/mjfas/article/view/2331