label: N-hexadecanoylsphing-4-enine + phosphocholine + H(+) => N-(hexadecanoyl)-sphing-4-enine-1-phosphocholine + H2O
label_lc: n-hexadecanoylsphing-4-enine + phosphocholine + h(+) => n-(hexadecanoyl)-sphing-4-enine-1-phosphocholine + h2o