The molecule is a chondroitin sulfate in which the site of sulfation is carbon 6 of the N-acetylgalactosamine (GalNAc) sugar. It is a conjugate acid of a chondroitin 6'-sulfate anion.
(2S,3S,4S,5R,6R)-6-[(2R,3R,4R,5R,6R)-3-acetamido-2,5-dihydroxy-6-(sulfooxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid