Using CCOC(=O)c1ccc(CCN)cc1, O=C(Nc1nc(C(=O)CBr)cs1)c1ccccc1 to produce CCOC(=O)c1ccc(CCNCC(O)c2csc(NC(=O)c3ccccc3)n2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.