preferred_name: hexanoate + sphing-4-enine => N-(hexanoyl)sphing-4-enine + H2O
preferred_name_lc: hexanoate + sphing-4-enine => n-(hexanoyl)sphing-4-enine + h2o
label: hexanoate + sphing-4-enine => N-(hexanoyl)sphing-4-enine + H2O
label_lc: hexanoate + sphing-4-enine => n-(hexanoyl)sphing-4-enine + h2o