Using CCOP(=O)(CC(CC(C)C)C(=O)OCc1ccccc1)CN1C(=O)CNC1=O to produce CCOP(=O)(CC(CC(C)C)C(=O)O)CN1C(=O)CNC1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.