Gerald Rosen, Frank D. Popp. Diazepines. V. The Reaction of Homophthalic Anhydride with Hydrazines // J. Heterocycl. Chem. 1969, Volume 6, pp. 9-12
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https://www.jhetchem.com/cd2html.php?file=19690009
Mariusz Kertesz, Istvan Pallagi and Sandor Solyom. Cycloaddition Reactions with 2,3-Benzodiazepine Derivatives// J. Heterocycl. Chem.2007, Volume 44, pp. 431-435.
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https://www.jhetchem.com/cd2html.php?file=20070431
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