Using COc1ccc(Cl)cc1-n1c(=O)[nH]c2cc(Cl)ccc21 to produce O=c1[nH]c2cc(Cl)ccc2n1-c1cc(Cl)ccc1O, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.