[17-[[(1,1-dimethylethoxy)carbonyl]amino]-21,21-dimethyl-6,8,19-trioxo-20-oxa-5,9,16,18-tetraaza-17-docosen-1-yl][3-[(1,1-dimethylethoxy)carbonyl]-3-methylbutyl]carbamic acid, 1,1-dimethylethyl ester

[21-[[(1,1-dimethylethoxy)carbonyl]amino]-1,25,25-trimethyl-10,12,23-trioxo-4-(phenylmethyl)-24-oxa-4,9,13,20,22-pentaaza-21-hexacosen-1-yl]carbamic acid, 1,1-dimethylethyl ester (S)

[21-[[(1,1-dimethylethoxy)carbonyl]amino]-1,25,25-trimethyl-10,12,23-trioxo-4-(phenylmethyl)-24-oxa-4,9,13,20,22-pentaaza-21-hexacosen-1-yl]carbamic acid, 1,1-dimethylethyl ester (R)