Using CC(C)(C)OC(=O)CN, N=C(N)NCCC[C@H](NC(=O)OCc1ccccc1)C(=O)O to produce CC(C)(C)OC(=O)CNC(=O)[C@H](CCCNC(=N)N)NC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.