preferred_name: sphing-4-enine + a fatty acid => an N-acylsphing-4-enine + H2O
preferred_name_lc: sphing-4-enine + a fatty acid => an n-acylsphing-4-enine + h2o
label: sphing-4-enine + a fatty acid => an N-acylsphing-4-enine + H2O
label_lc: sphing-4-enine + a fatty acid => an n-acylsphing-4-enine + h2o