Using CCOP(=O)(C(Cc1ccccc1)NC(=O)OC(C)(C)C)C(Cc1ccccc1)NC(=O)OC(C)(C)C to produce CCOP(=O)(C(N)Cc1ccccc1)C(N)Cc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.