Intramolecular 1,3-Dipolar Cycloaddition of Alkenylnitrones of the 4H-Imidazole Series: Synthesis of a New Nitroxide pH-Sensitive Spin Probe - Morozov, Denis A.; Kirilyuk, Igor A.; Gatilov, Yuri V.; Bagryanskaya, Irina Yu.; Bozhko, Julya Yu.; Komarov, Denis A.; Grigor’ev, Igor A. (Synthesis, 2010)