Using OCc1cc(-c2ccc3c(c2)OCO3)n(-c2cc(Cl)ccc2Cl)n1 to produce O=Cc1cc(-c2ccc3c(c2)OCO3)n(-c2cc(Cl)ccc2Cl)n1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.