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Chen, G.-F.; Pappas, R.S.; Williams, E., Radical cation photoisomerization of bicyclo[2.2.2]octa-2,5-diene to tetracyclo[4.2.0.02,8.05,7]octane and its thermal retrogression, J. Am. Chem. Soc., 1992, 114, 8314-8316. [all data]