Using CC1(C)CCC(C)(C)c2cc(Oc3ccc4c(CO)cccc4c3)ccc21 to produce CC1(C)CCC(C)(C)c2cc(Oc3ccc4c(C=O)cccc4c3)ccc21, please predict the solvent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.