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Fuss W, Schmid WE, Trushin SA, Billone PS, Leigh WJ. Forward and backward pericyclic photochemical reactions have intermediates in common, yet cyclobutenes break the rules. Chemphyschem. 2007 Mar 12;8(4):592–8. doi: 10.1002/cphc.200600639. PMID: 17274091. |