4-Nitrobenzenesulfonyl chloride → 3-(4-Benzyloxy-phenyl)-2-[4-methyl-2-(4-nitro-benzenesulfonylamino)-pentanoylamino]-propionic acid tert-butyl ester

Reaction equation

[C:1]([O:5][C:6](=[O:32])[CH:7]([NH:23][C:24](=[O:31])[CH:25]([NH2:30])[CH2:26][CH:27]([CH3:29])[CH3:28])[CH2:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[CH:11][CH:10]=1)([CH3:4])([CH3:3])[CH3:2].[N+:33]([C:36]1[CH:41]=[CH:40][C:39]([S:42](Cl)(=[O:44])=[O:43])=[CH:38][CH:37]=1)([O-:35])=[O:34].C(N(CC)C(C)C)(C)C>CN(C1C=CN=CC=1)C.C1C=CC=CC=1.C(OC)(C)(C)C>[C:1]([O:5][C:6](=[O:32])[CH:7]([NH:23][C:24](=[O:31])[CH:25]([NH:30][S:42]([C:39]1[CH:38]=[CH:37][C:36]([N+:33]([O-:35])=[O:34])=[CH:41][CH:40]=1)(=[O:43])=[O:44])[CH2:26][CH:27]([CH3:28])[CH3:29])[CH2:8][C:9]1[CH:14]=[CH:13][C:12]([O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[CH:11][CH:10]=1)([CH3:3])([CH3:2])[CH3:4]