Moosavi-Zare, Ahmad Reza, and Hadis Afshar-Hezarkhani. “N-Sulfonic Acid Pyridinium-4-Carboxylic Acid Chloride As a Novel and Efficient Catalyst for the Condensation Reaction of Aldehyde With Thiobarbituric Acid and Ammonium Acetate”. Iranian Journal of Catalysis 10, no. 2 (February 3, 2024). Accessed June 6, 2026. http://oiccpress.com/ijc/article/view/3551.