Using COC(=O)c1cc2nc(Nc3c(Cl)cncc3Cl)[nH]c2nc1OC1CCOC1 to produce O=C(O)c1cc2nc(Nc3c(Cl)cncc3Cl)[nH]c2nc1OC1CCOC1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.