The molecule is a D-galactosylglycerol that is alpha-D-glucofuranose in which the hydrogen of the anomeric hydroxy group has been replaced by a 2,3-dihydroxypropyl group.
(2S,3R,4R,5S)-2-[(1R)-1,2-dihydroxyethyl]-5-(2,3-dihydroxypropoxy)oxolane-3,4-diol