EFFICIENT SYNTHESIS AND SPECTROSCOPIC ANALYSIS OF 8-NITRO SPIRO C-3-ANNULATED 2-BENZAZEPINES AND THEIR N-OXIDES Статья Varlamov A., Kouznetsov V., Zubkov F., Chernyshev A., Alexandrov G., Palma A., Vargas L., Salas S. Synthesis. 2001. С. 849-854