Title Encapsulated trinuclear metal cluster indealuminated NaY Zeolite as a reusable catalyst in the Synthesis of 2′-Amino-1,2-dihydro-2,5′-dioxo-5′H-spiro[indole-3,4′-pyrano[3,2-c]chromene]-3′-carbonitrile of CO3 (O)Y Type Presentation Keywords Not Registered! Abstract Not Registered! Researchers (Fourth Researcher), (Third Researcher), (Second Researcher)