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