label: all-trans-4-oxoretinoate + oxidized [NADPH--hemoprotein reductase] + 2 H2O + H(+) => all-trans-4-hydroxyretinoate + reduced [NADPH--hemoprotein reductase] + O2
label_lc: all-trans-4-oxoretinoate + oxidized [nadph--hemoprotein reductase] + 2 h2o + h(+) => all-trans-4-hydroxyretinoate + reduced [nadph--hemoprotein reductase] + o2