Using COc1ccc(-c2nc(-c3ccccc3)[nH]c2-c2ccc(OC)cc2)cc1 to produce Oc1ccc(-c2nc(-c3ccccc3)[nH]c2-c2ccc(O)cc2)cc1, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.