preferred_name: a sphingoid base + phosphate => a sphingoid 1-phosphate + H2O
preferred_name_lc: a sphingoid base + phosphate => a sphingoid 1-phosphate + h2o
label: a sphingoid base + phosphate => a sphingoid 1-phosphate + H2O
label_lc: a sphingoid base + phosphate => a sphingoid 1-phosphate + h2o