Using O=C=Nc1ccc(Cl)c(Cl)c1, COc1ccc(C2=NC(c3ccccc3)C(O)CO2)cc1 to produce COc1ccc(C2=NC(c3ccccc3)C(OC(=O)Nc3ccc(Cl)c(Cl)c3)CO2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.