Using CCOC(=O)CCn1nc(-c2ccc(Cl)cc2)n(C2CC2)c1=O to produce O=C(O)CCn1nc(-c2ccc(Cl)cc2)n(C2CC2)c1=O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.