(2S)-3-(1H-indol-3-yl)-2-methyl-2-[(4-nitrophenyl)carbamoylamino]-N-[(1-pyridin-2-ylcyclohexyl)methyl]propanamide
(2S)-3-(1H-indol-3-yl)-2-methyl-2-[(4-nitrophenyl)carbamoylamino]-N-[[1-(2-pyridyl)cyclohexyl]methyl]propanamide
(2S)-3-(1H-indol-3-yl)-2-methyl-2-[[[(4-nitrophenyl)amino]-oxomethyl]amino]-N-[[1-(2-pyridyl)cyclohexyl]methyl]propanamide
(2S)-3-(1H-indol-3-yl)-2-methyl-2-[(4-nitrophenyl)carbamoylamino]-N-[[1-(2-pyridyl)cyclohexyl]methyl]propionamide