N-octadecanoyl-(4R)-hydroxysphinganine + CoA + H(+) => (4R)-hydroxysphinganine + octadecanoyl-CoA
n-octadecanoyl-(4r)-hydroxysphinganine + coa + h(+) => (4r)-hydroxysphinganine + octadecanoyl-coa
N-octadecanoyl-(4R)-hydroxysphinganine + CoA + H(+) => (4R)-hydroxysphinganine + octadecanoyl-CoA
n-octadecanoyl-(4r)-hydroxysphinganine + coa + h(+) => (4r)-hydroxysphinganine + octadecanoyl-coa