Using O=C(O)c1ccccc1S, O=C(O)CN1C(=O)c2cccc3c(Cl)ccc(c23)C1=O to produce O=C(O)CN1C(=O)c2cccc3c(Sc4ccccc4C(=O)O)ccc(c23)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.