an N-acylsphing-4-enine(out) => an N-acylsphing-4-enine(in)
an n-acylsphing-4-enine(out) => an n-acylsphing-4-enine(in)
an N-acylsphing-4-enine(out) => an N-acylsphing-4-enine(in)
an n-acylsphing-4-enine(out) => an n-acylsphing-4-enine(in)