The molecule is an inositol phosphomannosylinositol phosphophytoceramide(2-) having an inositol 1-phosphinato group linked to the mannose residue (at the 6-position) and a hexacosanoyl group amide-linked to a C18 sphinganine base, with no hydroxylation at C-4 of the long-chain base and hydroxylation at C2 of the C26 very-long-chain fatty acid. Major species at pH 7.3. It is a conjugate base of an Ins-1-P-6-Man-1-2-Ins-1-P-Cer(d18:0/2-OH-26:0).
[(2S,3R)-3-hydroxy-2-(2-hydroxyhexacosanoylamino)octadecyl] [(1R,2R,3R,4R,5S,6R)-2,3,4,5-tetrahydroxy-6-[(3S,4S,5S,6R)-3,4,5-trihydroxy-6-[[oxido-[(2R,3S,5R,6R)-2,3,4,5,6-pentahydroxycyclohexyl]oxyphosphoryl]oxymethyl]oxan-2-yl]oxycyclohexyl] phosphate