N-Acetyl-alpha-D-glucosaminyl-(1->4)-beta-D-glucuronosyl-(1->4)-N-acetyl-alpha-D-glucosaminylproteoglycan
n-acetyl-alpha-d-glucosaminyl-(1->4)-beta-d-glucuronosyl-(1->4)-n-acetyl-alpha-d-glucosaminylproteoglycan