The molecule is a 3-[beta-D-glucopyranosyl-(1->6)-beta-D-galactopyranosyl]-1,2-diacyl-sn-glycerol in which the acyl groups at O-1 and O-2 are both stearoyl. A synthetic acyl homologue of the beta-glycolipid antigens (beta-GGLs) of Mycoplasma pneumoniae.
[(2S)-2-octadecanoyloxy-3-[(2R,3R,4S,5R,6R)-3,4,5-trihydroxy-6-[[(2R,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxymethyl]oxan-2-yl]oxypropyl] octadecanoate