Using CCOC(=O)CCSc1nnc(Br)n1-c1ccc(C2CC2)c2ccccc12 to produce Sc1nnc(Br)n1-c1ccc(C2CC2)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.