Tentative structure of a sialic acid-containing sphingolipid from the haptophyte E. huxleyi.
A novel sphingolipid isolated from E. huxleyi with a polar head group containing the deaminated sialic acid, 2-keto-3-deoxy-d-glycero-d-galacto-nononic acid (KDN). Structure redrawn from Fulton et al. [49].