label: an N-acyl-(4R)-4-hydroxysphinganine + AH2 + O2 => a (4R,8E)-4-hydroxysphingenine ceramide + A + 2 H2O
label_lc: an n-acyl-(4r)-4-hydroxysphinganine + ah2 + o2 => a (4r,8e)-4-hydroxysphingenine ceramide + a + 2 h2o