3-[[3,5-Bis(trifluoromethyl)phenyl]amino]-4-[[(8α,9S)-6'-methoxycinchonan-9-yl]amino]-3-cyclobutene-1,2-dione

3-[[3,5-Bis(trifluoromethyl)phenyl]amino]-4-[[(8α,9S)-6'-methoxycinchonan-9-yl]amino]-3-cyclobutene-1,2-dione