sphing-4-enine + octadecanoate => N-octadecanoylsphing-4-enine + H2O
sphing-4-enine + octadecanoate => n-octadecanoylsphing-4-enine + h2o
sphing-4-enine + octadecanoate => N-octadecanoylsphing-4-enine + H2O
sphing-4-enine + octadecanoate => n-octadecanoylsphing-4-enine + h2o