Using O=Cc1ccc(OCc2ccc3ccc(Cl)cc3n2)c(C=O)c1 to produce O=Cc1ccc2oc(-c3ccc4ccc(Cl)cc4n3)cc2c1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.