الفهرس 
acknowledgmentOnly 14 pages are availabe for public view
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Abstract
Nature products (NPs) are chemical entities produced by living organisms of specialinterest for drug discoveries. The class of NPs defined as secondary metabolites i.e.metabolites which are not directly necessary for host survival and they are typicallyproduced by organisms such as bacteria, fungi, plants, various marine invertebrates and areusually used as means of attack.