Using CCCC(C)OCCCOC(=O)c1cc(OC(C)=O)ccc1-c1ccccc1 to produce CCCC(C)OCCCOC(=O)c1cc(O)ccc1-c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.