n-acetylglucosamine nag food supplement molecule. skeletal formula.

acetic acetylglucosamine acid amine amino antiinflammatory arthritis atomic atoms cartilage chemical chemistry chitin composition compound crustacean dietary drawing flat formula glcnac glucosamine glucose glycosaminoglycans glycosylated hexosamine hyaluronan hydrochloride icon joint line molecular molecule monosaccharide nag osteoarthritis proteoglycan skeletal structure sugar sulfate supplement synovial