Using COC(=O)C(Cl)Cl, Oc1cc2onc(-c3ccccc3)c2cc1O to produce O=C(O)C1Oc2cc3onc(-c4ccccc4)c3cc2O1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.