Using CC(C)(C)OC(=O)C[C@H](NC(=O)CC(=O)NCCc1ccc(C(=N)N)cc1)C(=O)N[C@@H](Cc1ccccc1)C(=O)OC(C)(C)C to produce N=C(N)c1ccc(CCNC(=O)CC(=O)N[C@@H](CC(=O)O)C(=O)N[C@@H](Cc2ccccc2)C(=O)O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.