Using COC(=O)c1ccc(CN(c2nc3cc(OC)ccc3n2C)C2CCC(C(C)(C)C)CC2)cc1 to produce COC(=O)c1ccc(CN(c2nc3cc(O)ccc3n2C)C2CCC(C(C)(C)C)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.