The molecule is a phosphatidylinositol mannoside having on a myo-inositol ring a phosphatidyl moiety (carrying palmitoyl and 10-methyloctadecanoyl groups) at the 1-position, an alpha-D-mannosyl residue at the 2-position, a palmitoyl group at the 5-position and a 6-O-palmitoyl-alpha-D-mannosyl group at the 6-position. It has a role as a bacterial metabolite and an allergen. It is a conjugate acid of a 2-O-alpha-D-mannosyl-1-O-{1-O-[(10S)-10-methyloctadecanoyl]-2-O-palmitoyl-sn-glycero-3-phosphonato}-5-O-palmitoyl-6-O-(6-O-palmitoyl-alpha-D-mannosyl)-1D-myo-inositol.
[(2R)-2-hexadecanoyloxy-3-[[(1R,2R,3S,4R,5R,6R)-3-hexadecanoyloxy-2-[(2R,3S,4S,5S,6R)-6-(hexadecanoyloxymethyl)-3,4,5-trihydroxyoxan-2-yl]oxy-4,5-dihydroxy-6-[(2R,3S,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxycyclohexyl]oxy-hydroxyphosphoryl]oxypropyl] (10S)-10-methyloctadecanoate