preferred_name: (3E)-2-oxohex-3-enedioate => (2Z,4E)-2-hydroxyhexa-2,4-dienedioate
preferred_name_lc: (3e)-2-oxohex-3-enedioate => (2z,4e)-2-hydroxyhexa-2,4-dienedioate
label: (3E)-2-oxohex-3-enedioate => (2Z,4E)-2-hydroxyhexa-2,4-dienedioate
label_lc: (3e)-2-oxohex-3-enedioate => (2z,4e)-2-hydroxyhexa-2,4-dienedioate