(S)-3-((3,5-Bis(trifluoromethyl)phenyl)amino)-4-((pyrrolidin-2-ylmethyl)amino)cyclobut-3-ene-1,2-dione

(S)-3-((3,5-Bis(trifluoromethyl)phenyl)amino)-4-((pyrrolidin-2-ylmethyl)amino)cyclobut-3-ene-1,2-dione,