mucopolysaccharides

Polysaccharides composed of alternating units from uronic acids and glycosamines, and commonly partially esterified with sulfuric acid.
Source:
PAC, 1995, 67, 1307 (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1350
See also:
White Book, p. 86