4,4-dihydroxy-all-trans-beta-carotene = echinenone + H2O
4,4-dihydroxy-all-trans-beta-carotene = echinenone + h2o
4,4-dihydroxy-all-trans-beta-carotene = echinenone + H2O
4,4-dihydroxy-all-trans-beta-carotene = echinenone + h2o