Using Nc1cccnc1, O=C(O)CCc1cnoc1-c1ccc(Cl)cc1 to produce O=C(CCc1cnoc1-c1ccc(Cl)cc1)Nc1cccnc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.