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- [4] Synthesis of 5,6-Dihydro-4H-pyrrolo[1,2-b ]pyrazoles and Homologs from 5-Substituted 2-(Alkynyl)tetrazoles via Microwave-Induced Intramolecular Nitrile-Imine-Alkyne 1,3-Dipolar Cycloaddition SYNTHESIS-STUTTGART, 2022, 55 (06): : 945 - 958