Using Clc1ccc2nc(Cl)sc2c1, CC(C)(C)OC(=O)c1ccc(N)cc1 to produce O=C(O)c1ccc(Nc2nc3ccc(Cl)cc3s2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.