The molecule is a glycosylxylose that is beta-D-xylopyranose in which the hydroxy group at position 4 has been converted into the corresponding beta-D-galactopyranoside.
(2R,3R,4S,5R,6S)-2-(hydroxymethyl)-6-[(3R,4R,5R,6R)-4,5,6-trihydroxyoxan-3-yl]oxyoxane-3,4,5-triol