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https://doi.org/10.1135/cccc19750137
Electroreduction of the enolate-anions of some 5,7-dioxo-6,7-dihydro-5H-dibenzo[a,c]cycloheptene derivatives. The infrared spectra and structures of 5-oxo-7-hydroxy-6,7-dihydro-5H-dibenzo[a,c]cycloheptenes
D. Zacharová-Kalavská, A Perjéssy, F. Szémes and P. Hrnčiar