Using CCCCCCCCCCCCCCCCOCC(O)COC(c1ccccc1)(c1ccccc1)c1ccc(OC)cc1, O=C(O)CCl to produce CCCCCCCCCCCCCCCCOCC(CO)OCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.