Synthesis of methyl 6-amino-5-cyano-4-aryl-2,4-dihydropyrano[2,3-c]pyrazole-3-carboxylates using nanocrystalline ZnZr4(PO4)6 ceramics as an efficient catalyst Javad Safaei-Ghomi, Mehrnoosh Asgari-Kheirabadi, Hossein Shahbazi-Alvi, Abolfazl Ziarati, Requires Subscription HTML Requires Subscription PDF views: 20 downloads: 158