Using COC(OC)OC, Cc1nc2c(-c3ccncc3)nc(Nc3cc(Cl)ccc3N)nc2n1C1CCOCC1 to produce Cc1nc2c(-c3ccncc3)nc(-n3cnc4ccc(Cl)cc43)nc2n1C1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.