Ghashang, Majid, Mohammad Shafiee, Mohammad Reza, Hojati Najafabadi, Batool (2012). Preparation of 1,5-diaryl-3-(arylamino)-1H-pyrrol- 2(5H)-one derivatives using 1-methylpiperidinium hydrogen sulfate as an efficient catalyst. *Journal of the Iranian Chemical Research*, 5(2), 65-71.