Using COCCc1nc2c(N)nc3ccccc3c2n1CCCN, O=C(Cl)N1CCOCC1 to produce COCCc1nc2c(N)nc3ccccc3c2n1CCCNC(=O)N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.