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) = an n-acylsphing-4-enine(out)