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