فهرس المقالات N-sulfonic acid pyridinioum-4-carboxylic acid chloride حرية الوصول المقاله صفحة الملخص نص كامل 1 - 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 Ahmad Reza Moosavi-Zare Hadis Afshar-Hezarkhani
