Using COC(=O)c1ccc2c(c1)Oc1c(OC)cccc1N2C1CCN(Cc2ccccc2)CC1 to produce COc1cccc2c1Oc1cc(C(=O)O)ccc1N2C1CCN(Cc2ccccc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.