A. R. Moosavi-Zare and H. 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”, Iran. J. Catal., vol. 10, no. 2, Feb. 2024, Accessed: Jun. 06, 2026. [Online]. Available: http://oiccpress.com/ijc/article/view/3551