preferred_name: an N-acylsphing-4-enine(in) => an N-acylsphing-4-enine(out)
preferred_name_lc: an n-acylsphing-4-enine(in) => an n-acylsphing-4-enine(out)
label: an N-acylsphing-4-enine(in) => an N-acylsphing-4-enine(out)
label_lc: an n-acylsphing-4-enine(in) => an n-acylsphing-4-enine(out)