eicosanoate + sphing-4-enine => N-eicosanoyl-sphing-4-enine + H2O
eicosanoate + sphing-4-enine => n-eicosanoyl-sphing-4-enine + h2o
eicosanoate + sphing-4-enine => N-eicosanoyl-sphing-4-enine + H2O
eicosanoate + sphing-4-enine => n-eicosanoyl-sphing-4-enine + h2o