all-trans-4-oxo-13,14-dihydroretinoate + oxidized [NADPH--hemoprotein reductase] + 2 H2O + H(+) => all-trans-4-hydroxy-13,14-dihydroretinoate + reduced [NADPH--hemoprotein reductase] + O2
all-trans-4-oxo-13,14-dihydroretinoate + oxidized [nadph--hemoprotein reductase] + 2 h2o + h(+) => all-trans-4-hydroxy-13,14-dihydroretinoate + reduced [nadph--hemoprotein reductase] + o2