sphing-4-enine + acetate => N-(acetyl)-sphing-4-enine + H2O
sphing-4-enine + acetate => n-(acetyl)-sphing-4-enine + h2o
sphing-4-enine + acetate => N-(acetyl)-sphing-4-enine + H2O
sphing-4-enine + acetate => n-(acetyl)-sphing-4-enine + h2o