Chitin -LRB- C8H13O5N -RRB- n -LRB- -RRB- is a long-chain polymer of a N-acetylglucosamine , a derivative of glucose , and is found in many places throughout the natural world .

Chitin -LRB- C8H13O5N -RRB- n -LRB- IPA : -RRB- is a long-chain polymeric polysaccharide of beta-glucose that forms a hard , semitransparent material found throughout the natural world .
