Using O=Cc1sc2cc3c(cc2c1Cl)OCO3, Oc1ccc(Cl)cc1 to produce O=Cc1sc2cc3c(cc2c1Oc1ccc(Cl)cc1)OCO3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.