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An efficient, ZnO-NiO-Fe 3 O 4  nano-composite catalyzed method has been developed for the ultrasonic irradiation synthesis of some 6-amino-3-methyl-4-aryl-2,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile heterocycles in good to excellent yields. ZnO-NiO-Fe 3 O 4  nanocomposite was characterized by XRD, FE-SEM, EDS, and DLS techniques. According to the XRD analysis, the sample consisted of three different phases: ZnO (hexagonal), NiO (cubic), and Fe 3 O 4  (cubic). The average particle size of the sample is 68 nm. Supplemental data for this article is available online at

Ultrasonic Assisted Preparation of Pyrano[2,3-c]Pyrazole Derivatives Using ZnO-NiO-Fe 3 O 4 Nano-Composite System