Using CCc1cc(C(=O)NCc2cccc3[nH]ncc23)sc1C(=O)OC to produce CCc1cc(C(=O)NCc2cccc3[nH]ncc23)sc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.