Using Fc1ccc(-c2cnc(S)n2-c2ccc(Cl)cc2)cc1, CCOC(=O)CCBr to produce CCOC(=O)CCn1cc(-c2ccc(F)cc2)n(-c2ccc(Cl)cc2)c1=S, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.