Furfural is produced by the acid-catalyzed digestion of pentosan sugars, C polysaccharides, in biomass. Medications may include ibuprofen, pentosan polysulfate, or amitriptyline. Pentosan polysulfate has also shown recent promise. A polymer composed of pentose sugars is called a pentosan. In addition to TIMP3, it can also be inhibited by calcium pentosan polysulfate. Pentosan polysulfate (PPS) is a medication used for interstitial cystitis and osteoarthritis. Pentosan polysulfate, like Adequan, has been shown to improve signs of osteoarthritis.