preferred_name: all-trans-zeta-carotene + 2 A = all-trans-lycopene + 2 AH2
preferred_name_lc: all-trans-zeta-carotene + 2 a = all-trans-lycopene + 2 ah2
label: all-trans-zeta-carotene + 2 A = all-trans-lycopene + 2 AH2
label_lc: all-trans-zeta-carotene + 2 a = all-trans-lycopene + 2 ah2