echinenone + 2 AH2 + 2 O2 = canthaxanthin + 2 A + 3 H2O
echinenone + 2 ah2 + 2 o2 = canthaxanthin + 2 a + 3 h2o
echinenone + 2 AH2 + 2 O2 = canthaxanthin + 2 A + 3 H2O
echinenone + 2 ah2 + 2 o2 = canthaxanthin + 2 a + 3 h2o