فهرس المقالات PEG-400 حرية الوصول المقاله صفحة الملخص نص كامل 1 - A Novel protocol for synthesis of Hantzsch 1, 4- dihydropyridines using PEG-400 as a reaction medium and under catalyst-free condition Ali Ezabadi Fatemeh Tosan حرية الوصول المقاله صفحة الملخص نص كامل 2 - Novel procedure for preparation of Hantzsch 1, 4- dihydropyridines using PEG-400 as a reaction medium and under catalyst-free condition Ali Ezabadi Fatemeh Tosan