Using O=C(OC1CCCCC1)c1csc(C2CC[NH2+]CC2)n1, O=C(O)Cc1cc(Br)ccc1Br to produce O=C(OC1CCCCC1)c1csc(C2CCN(C(=O)Cc3cc(Br)ccc3Br)CC2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.