tert-butyl N-[(2S)-1-[[(4aR,5S)-1,3-dioxo-2-(phenylmethyl)-4,4a,5,6,7,8-hexahydropyrido[2,1-f]pyrimidin-5-yl]amino]-3-(1H-indol-3-yl)-1-oxopropan-2-yl]carbamate
tert-butyl N-[(1S)-2-[[(4aR,5S)-1,3-dioxo-2-(phenylmethyl)-4,4a,5,6,7,8-hexahydropyrido[2,1-f]pyrimidin-5-yl]amino]-1-(1H-indol-3-ylmethyl)-2-oxo-ethyl]carbamate
N-[(1S)-2-[[(4aR,5S)-1,3-dioxo-2-(phenylmethyl)-4,4a,5,6,7,8-hexahydropyrido[2,1-f]pyrimidin-5-yl]amino]-1-(1H-indol-3-ylmethyl)-2-oxoethyl]carbamic acid tert-butyl ester
N-[(1S)-2-[[(4aR,5S)-2-(benzyl)-1,3-diketo-4,4a,5,6,7,8-hexahydropyrido[1,2-c]pyrimidin-5-yl]amino]-1-(1H-indol-3-ylmethyl)-2-keto-ethyl]carbamic acid tert-butyl ester
tert-butyl N-[(2S)-1-[[(4aR,5S)-1,3-dioxo-2-(phenylmethyl)-4,4a,5,6,7,8-hexahydropyrido[2,1-f]pyrimidin-5-yl]amino]-3-(1H-indol-3-yl)-1-oxo-propan-2-yl]carbamate