Using CC1CCN(C(=O)CNc2cc(Cl)cc(Cl)c2)CC1NC(=O)OC(C)(C)C to produce CC1CCN(C(=O)CNc2cc(Cl)cc(Cl)c2)CC1N, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.