Using COCCNC(=O)c1sc2cc(OCc3ccc(Cl)cc3Cl)ccc2c1OCOC to produce COCCNC(=O)c1sc2cc(OCc3ccc(Cl)cc3Cl)ccc2c1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.