The molecule is a galactosamine sulfate that is N-acetyl-beta-D-galactosamine in which the hydroxy group at position 6 has been converted into its sulfate derivative. It is a conjugate acid of a N-acetyl-beta-D-galactosamine 6-sulfate(1-).
[(2R,3R,4R,5R,6R)-5-acetamido-3,4,6-trihydroxyoxan-2-yl]methyl hydrogen sulfate