Using C=CCOC(=O)Nc1cc(-c2cccc(Cl)c2)sc1C(C)(C)O to produce CC1(C)OC(=O)Nc2cc(-c3cccc(Cl)c3)sc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.