preferred_name: cytosine + acetate + H(+) => N(4)-acetylcytosine + H2O
preferred_name_lc: cytosine + acetate + h(+) => n(4)-acetylcytosine + h2o
label: cytosine + acetate + H(+) => N(4)-acetylcytosine + H2O
label_lc: cytosine + acetate + h(+) => n(4)-acetylcytosine + h2o