preferred_name: inosine(in) + H(+)(out) => inosine(out) + H(+)(in)
preferred_name_lc: inosine(in) + h(+)(out) => inosine(out) + h(+)(in)
label: inosine(in) + H(+)(out) => inosine(out) + H(+)(in)
label_lc: inosine(in) + h(+)(out) => inosine(out) + h(+)(in)