Using CCOC(=O)CNC(=O)CSc1ncc(Br)n1-c1ccc(C#N)c2ccccc12 to produce N#Cc1ccc(-n2c(Br)cnc2SCC(=O)NCC(=O)O)c2ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.