Using COC(=O)C1CCC(c2cc(-c3ccc(OC4CC4)c(Cl)c3)ncn2)N1 to produce O=C(O)C1CCC(c2cc(-c3ccc(OC4CC4)c(Cl)c3)ncn2)N1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.