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Pyrazolines are an important class of heterocyclic compounds with diverse applications. A novel bis-chalcone-derived fused ring pyrazoline has been obtained by the reaction of bis-chalcone with hydrazine hydrate in acetic acid solvent having a catalytic amount of HCl and characterized by IR, 1H and 13C NMR, GC–MS, and finally by X-ray single crystal analysis. Interestingly, the in situ post-cyclization...
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