Using COc1nc(C(C[C@H]2CCC(=O)N2)c2ccc(C(C)(C)C)cc2)ccc1Cl to produce CC(C)(C)c1ccc(C(C[C@H]2CCC(=O)N2)c2ccc(Cl)c(=O)[nH]2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.