preferred_name: a sphingomyelin + H2O => sphing-4-enine-phosphocholine + a carboxylate
preferred_name_lc: a sphingomyelin + h2o => sphing-4-enine-phosphocholine + a carboxylate
label: a sphingomyelin + H2O => sphing-4-enine-phosphocholine + a carboxylate
label_lc: a sphingomyelin + h2o => sphing-4-enine-phosphocholine + a carboxylate