Using CCOc1ccc(C2ON(C(=O)OC(C)(C)C)C(C)C=C2C)cc1, CC(=O)Cl to produce CCOc1ccc(C2ONC(C)C=C2C)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.