The molecule is a mannosylinositol phosphorylceramide(1-) having a hexacosanoyl group amide-linked to a C18 phytosphingosine base, with hydroxylation at C-2 of the C26 very-long-chain fatty acid. Major species at pH 7.3. It is a conjugate base of a Man-1-2-Ins-1-P-Cer(t18:0/2-OH-26:0).
[(2S,3S)-3,4-dihydroxy-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-(hydroxymethyl)oxan-2-yl]oxycyclohexyl] phosphate