Using O=C(Cl)c1ccccc1, CC1=CCCC(C)(C)C1C(=O)CC(C)O to produce CC1=CCCC(C)(C)C1C(=O)CC(C)OC(=O)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.