فهرس المقالات 3-c]chromene حرية الوصول المقاله صفحة الملخص نص كامل 1 - Mefenamic acid as Environmentally Catalyst for Threecomponent Synthesis of Dihydropyrano [2,3-c]Chromene and Pyrano[2,3-d]Pyrimidine Derivatives Soheila Asadpour Behzadi Enayatollah Sheikhhosseini Sayed Ali Ahmadi Dadkhoda Ghazanfari Mohammadreza Akhgar حرية الوصول المقاله صفحة الملخص نص كامل 2 - Vitamin B12 used as effective biocatalyst for the synthesis of pyrano[2,3-c]cromenes and pyrano[2,3-d]pyrimidines Ghasem Marandi Reyhaneh Nadernia Nourallah Hazeri Malek Taher Maghsoodlou 10.30495/ijc.2022.689575