preferred_name: 4-hydroxy-2-oxohexanoate => (2Z,4Z)-2-hydroxyhexa-2,4-dienoate + H2O
preferred_name_lc: 4-hydroxy-2-oxohexanoate => (2z,4z)-2-hydroxyhexa-2,4-dienoate + h2o
label: 4-hydroxy-2-oxohexanoate => (2Z,4Z)-2-hydroxyhexa-2,4-dienoate + H2O
label_lc: 4-hydroxy-2-oxohexanoate => (2z,4z)-2-hydroxyhexa-2,4-dienoate + h2o