Using O=C(Cl)c1ccc2ccccc2c1, C=CC(C)CCCC(C)(C)OC(C)=O to produce C=CC(C)CCCC(C)(C)OC(=O)CC(=O)c1ccc2ccccc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.