Using N#CBr, NC1(c2ncccc2O)c2cc(Br)ccc2Oc2cnc(Cl)cc21 to produce NC1=NC2(c3cc(Br)ccc3Oc3cnc(Cl)cc32)c2ncccc2O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.