Using CC(C)(C)c1onc(-c2ccc(Cl)cc2Cl)c1C(=O)c1cccnc1 to produce CC(C)(C)c1onc(-c2ccc(Cl)cc2Cl)c1C(O)c1cccnc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.