ChemInform Abstract: Novel Complex N-Heterocycles via Intramolecular 1,5-Electrocyclizations: 1,2,4,4a,5,5a,10-Octahydropyrido[4′′,3′′:2′,3′]cyclobuta [1′,2′:4,5]pyrrolo[2,3-b]pyridines.

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