N-acetyl-D-galactosaminyl-(1->4)-beta-D-glucuronyl-N-acetyl-(1->3)-beta-D-galactosaminylproteoglycan
n-acetyl-d-galactosaminyl-(1->4)-beta-d-glucuronyl-n-acetyl-(1->3)-beta-d-galactosaminylproteoglycan