Using COCCOc1nc(N)c2[nH]cnc2n1, CCOC(=O)C(Br)c1ccccc1 to produce CCOC(=O)C(c1ccccc1)n1cnc2c(N)nc(OCCOC)nc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.