Using COC(=O)c1ccc(COc2ccc3c(c2)CCN(C2CCCC2)CC3)cc1 to produce O=C(O)c1ccc(COc2ccc3c(c2)CCN(C2CCCC2)CC3)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.