preferred_name: (S)-allantoin(in) + H(+)(in) = (S)-allantoin(out) + H(+)(out)
preferred_name_lc: (s)-allantoin(in) + h(+)(in) = (s)-allantoin(out) + h(+)(out)
label: (S)-allantoin(in) + H(+)(in) = (S)-allantoin(out) + H(+)(out)
label_lc: (s)-allantoin(in) + h(+)(in) = (s)-allantoin(out) + h(+)(out)