Using CC(C)(C)OC(=O)Nc1ccc2c(c1)C(=O)N[C@H](C(=O)O)C2, NC(=O)[C@@H]1CCCN1C(=O)[C@@H](N)Cc1c[nH]cn1 to produce CC(C)(C)OC(=O)Nc1ccc2c(c1)C(=O)N[C@H](C(=O)N[C@@H](Cc1c[nH]cn1)C(=O)N1CCC[C@H]1C(N)=O)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.