The molecule is an inositol phosphomannosylinositol phosphophytoceramide(2-) having an inositol 1-phosphoryl group linked at the 6-position to the mannose residue and a hexacosanoyl group amide-linked to a C18 sphinganine base, with no hydroxylation at C-4 of the long-chain base or on the C26 very-long-chain fatty acid. Major species at pH 7.3. It is an Ins-1-P-6-Man-1-2-Ins-1-P-Cer(d18:0/26:0) and an inositol phosphomannosylinositol-1-phosphodihydroceramide(2-).
[(2R,3S,4S,5S)-6-[(1R,2R,3R,4R,5R,6S)-2-[[(2S,3R)-2-(hexacosanoylamino)-3-hydroxyoctadecoxy]-oxidophosphoryl]oxy-3,4,5,6-tetrahydroxycyclohexyl]oxy-3,4,5-trihydroxyoxan-2-yl]methyl [(2R,3R,5S,6R)-2,3,4,5,6-pentahydroxycyclohexyl] phosphate