The molecule is the D-glycero-diastereomer of alpha-D-manno-heptopyranose; a key structural component of the outer cell membrane in Gram-negative bacteria, found in the conserved core oligosaccharide region.
(2S,3S,4S,5S,6R)-6-[(1R)-1,2-dihydroxyethyl]oxane-2,3,4,5-tetrol