glucosamine molecule, monosaccharides molecular structure, 3d model van der waals

glucosamine monosaccharides amino sugar molecule molecular structure chemical formula isolated model c6h13no5 atom chemistry joint glucose osteoarthritis supplement dietary chitin compound atomic skeletal carbon arthritis hydrogen oxygen science icon line nitrogen bond cartilage medicine crustacean illustration sign flat food glycosaminoglycans hexosamine hydrochloride proteoglycan sulfate drawing drug van der waals waals