preferred_name: all-trans-beta-carotene + AH2 + O2 <=> 4-hydroxy-all-trans-beta-carotene + A + H2O
preferred_name_lc: all-trans-beta-carotene + ah2 + o2 <=> 4-hydroxy-all-trans-beta-carotene + a + h2o
label: all-trans-beta-carotene + AH2 + O2 <=> 4-hydroxy-all-trans-beta-carotene + A + H2O
label_lc: all-trans-beta-carotene + ah2 + o2 <=> 4-hydroxy-all-trans-beta-carotene + a + h2o