Recyclization of (2-Aminophenyl)bis(5-tert-butyl-2-furyl)methanes into Indole Derivatives: Unusual Dependence on Substituent at Nitrogen Atom - Butin, Alexander V.; Smirnov, Sergey K.; Tsiunchik, Fatima A.; Uchuskin, Maxim G.; Trushkov, Igor V. (Synthesis, 2008)