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Structur o the chitin molecule, shawin twa o the N-acetylglucosamine units that repeat tae form lang chains in β-1,4 linkage.

Chitin (C8H13O5N)n (/ˈktn/ KY-tin) is a lang-chain polymer o a N-acetylglucosamine, a derivative o glucose, and is foond in mony places throughoot the naitural warld.