Dearomatization of 3,5-dinitropyridines – an atom-efficient approach to fused 3-nitropyrrolidines - Maxim A. Bastrakov; Anna Yu. Kucherova; Alexey K. Fedorenko; Alexey M. Starosotnikov; Ivan V. Fedyanin; Igor L. Dalinger; Svyatoslav A. Shevelev (ARKIVOC, 2017)