Using CSCCN1C(=O)C(N)Cc2ccccc21, O=C(O)c1cc2cc(Cl)sc2[nH]1 to produce CSCCN1C(=O)C(NC(=O)c2cc3cc(Cl)sc3[nH]2)Cc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.