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