Using COCC(=O)Nc1cccc2c1C(=O)N(C1CC(OC(C)=O)C(=O)NC1=O)C2=O to produce COCC(=O)Nc1cccc2c1C(=O)N(C1CC(O)C(=O)NC1=O)C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.