preferred_name: all-trans-neurosporene + A <=> all-trans-lycopene + AH2
preferred_name_lc: all-trans-neurosporene + a <=> all-trans-lycopene + ah2
label: all-trans-neurosporene + A <=> all-trans-lycopene + AH2
label_lc: all-trans-neurosporene + a <=> all-trans-lycopene + ah2