N-(2,3-dihydroxytetracosanoyl)-(4R)-hydroxysphinganine + NADP(+) + H2O = N-(2-hydroxytetracosanoyl)-(4R)-hydroxysphinganine + NADPH + O2 + H(+)
n-(2,3-dihydroxytetracosanoyl)-(4r)-hydroxysphinganine + nadp(+) + h2o = n-(2-hydroxytetracosanoyl)-(4r)-hydroxysphinganine + nadph + o2 + h(+)