Using COc1cc(N2CCc3nc(-c4ccc(Cl)cc4)sc3C2=O)ccc1OC1CN(C(=O)OC(C)(C)C)C1 to produce COc1cc(N2CCc3nc(-c4ccc(Cl)cc4)sc3C2=O)ccc1OC1CNC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.