Synthesis of functionalized chromeno[2,3-b]pyrrole-2,3-dicarboxylate via Zn(OTf)2-catalyzed annulation of 2-amino-4H-chromen-4-one and electron-deficient Acetylenes . IJC. 2025;64(8):823-828. doi:10.56042/ijc.v64i8.16926