Using COC(=O)c1sc(C(=O)NCc2cccc3c2CC(=O)N3)cc1C to produce Cc1cc(C(=O)NCc2cccc3c2CC(=O)N3)sc1C(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.