sphing-4-enine-phosphocholine + a carboxylate => a sphingomyelin + H2O
sphing-4-enine-phosphocholine + a carboxylate => a sphingomyelin + h2o
sphing-4-enine-phosphocholine + a carboxylate => a sphingomyelin + H2O
sphing-4-enine-phosphocholine + a carboxylate => a sphingomyelin + h2o