Using CCOP(=O)(OCC)C(C(CCCBr)c1cccnc1)P(=O)(O)O, CC([O-])=S to produce CCOP(=O)(OCC)C(C(CCCSC(C)=O)c1cccnc1)P(=O)(O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.