Using OCCBr, Nc1nc(Nc2ccccc2)nc(-c2noc(-c3ccco3)n2)n1 to produce Nc1nc(-c2noc(-c3ccco3)n2)nc(N(CCO)c2ccccc2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.