Using Cc1cccc(CCOc2cc(C(=O)OC(C)C)ccc2C2COC2)c1 to produce Cc1cccc(CCOc2cc(C(=O)O)ccc2C2COC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.