The molecule is a UDP-N-acetyl-D-galactosamine 4-sulfate(4-) in which the anomeric centre of the galactosamine fragment has alpha-configuration It is a conjugate base of an UDP-N-acetyl-alpha-D-galactosamine 4-sulfate.
[(2R,3R,4R,5R,6R)-3-acetamido-4-hydroxy-6-(hydroxymethyl)-5-sulfonatooxyoxan-2-yl] [[(2R,3S,4R,5R)-5-(2,4-dioxopyrimidin-1-yl)-3,4-dihydroxyoxolan-2-yl]methoxy-oxidophosphoryl] phosphate