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