(1R,1'R,2S,2'S,3R,3'R)-1,1'-(Pyrazine-2,5-diyl)bis(butane-1,2,3,4-tetraol) (Glucosamine Impurity)

(1R,1'R,2S,2'S,3R,3'R)-1,1'-(Pyrazine-2,5-diyl)bis(butane-1,2,3,4-tetraol) (Glucosamine Impurity)