Using CC(C)(C)OC(=O)N[C@@H](CCC(=O)OCc1ccccc1)C(=O)ON1C(=O)CCC1=O, C[C@H](N)C(=O)OC(C)(C)C to produce C[C@H](NC(=O)[C@H](CCC(=O)O)NC(=O)OC(C)(C)C)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.