preferred_name: all-trans-phytofluene + A <=> all-trans-zeta-carotene + AH2
preferred_name_lc: all-trans-phytofluene + a <=> all-trans-zeta-carotene + ah2
label: all-trans-phytofluene + A <=> all-trans-zeta-carotene + AH2
label_lc: all-trans-phytofluene + a <=> all-trans-zeta-carotene + ah2