The molecule is an inositol phosphomannosylinositol phosphoceramide compound having an inositol 1-phosphoryl group linked to the mannose residue (at the 6-position) and a tetracosanoyl group amide-linked to a C20 phytosphingosine base, with no hydroxylation of the C24 very-long-chain fatty acid. It derives from a Man-1-2-Ins-1-P-Cer(t20:0/24:0).
[(2R,3S,4S,5S)-6-[(1R,2R,3R,4R,5R,6S)-2-[[(2S,3S)-3,4-dihydroxy-2-(tetracosanoylamino)icosoxy]-hydroxyphosphoryl]oxy-3,4,5,6-tetrahydroxycyclohexyl]oxy-3,4,5-trihydroxyoxan-2-yl]methyl [(2R,3S,5R,6R)-2,3,4,5,6-pentahydroxycyclohexyl] hydrogen phosphate