Using C[O-], ClC(Cl)(Cl)c1nc(C2CC2)nc(C(Cl)(Cl)Cl)n1 to produce COc1nc(C2CC2)nc(C(Cl)(Cl)Cl)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.