Using CC(C)(C)O[K], COc1ccc2[nH]c3c(c2c1)COc1ccccc1-3 to produce COc1ccc2[nH]c3c(c2c1)C(O)Oc1ccccc1-3, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.