preferred_name: a sphingomyelin + H2O <=> phosphocholine + an N-acylsphing-4-enine + H(+)
preferred_name_lc: a sphingomyelin + h2o <=> phosphocholine + an n-acylsphing-4-enine + h(+)
label: a sphingomyelin + H2O <=> phosphocholine + an N-acylsphing-4-enine + H(+)
label_lc: a sphingomyelin + h2o <=> phosphocholine + an n-acylsphing-4-enine + h(+)