preferred_name: 7,7',9,9'-tetra-cis-lycopene <=> all-trans-lycopene
preferred_name_lc: 7,7',9,9'-tetra-cis-lycopene <=> all-trans-lycopene
label: 7,7',9,9'-tetra-cis-lycopene <=> all-trans-lycopene
label_lc: 7,7',9,9'-tetra-cis-lycopene <=> all-trans-lycopene