Using CCN(CC)C(=S)[S-], O=C(CCNC(=O)OCc1ccccc1)NCCBr to produce CCN(CC)C(=S)SCCNC(=O)CCNC(=O)OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.