Using CCOP(=O)(CO)OCC, Nc1ncnc2c1nc(CBr)n2CCc1ccccc1 to produce CCOP(=O)(COCc1nc2c(N)ncnc2n1CCc1ccccc1)OCC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.