Using CC(C)(C)C(=O)Cn1cncn1, O=CC(Cl)(Cl)Cl to produce CC(C)(C)C(=O)C(C(O)C(Cl)(Cl)Cl)n1cncn1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.