The molecule is a D-galactosylglycerol that is beta-D-glucopyranose in which the hydrogen of the anomeric hydroxy group has been replaced by a 2,3-dihydroxypropyl group.
(2R,3R,4S,5R,6R)-2-(2,3-dihydroxypropoxy)-6-(hydroxymethyl)oxane-3,4,5-triol