Using C=CCBr, Nc1nc(-c2ccco2)c2nnn(Cc3cccc(CO)n3)c2n1 to produce C=CCOCc1cccc(Cn2nnc3c(-c4ccco4)nc(N(CC=C)CC=C)nc32)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.