Using BrCc1ccccc1, N#Cc1c(N)nc(S)c(C#N)c1-c1ccc2c(c1)OCCO2 to produce N#Cc1c(N)nc(SCc2ccccc2)c(C#N)c1-c1ccc2c(c1)OCCO2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.