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Biological and Pharmaceutical Chemicals:Asymmetric synthesis, also known as chiral synthesis, stereoselective synthesis, and enantioselective synthesis, is a branch of organic synthesis that studies chemical reactions that introduce one or more chiral elements into reactants. According to the definition of Morrison and Mosher, asymmetric synthesis is "an organic reaction in which the achiral unit in the substrate molecule is converted into a chiral unit by a way that reactants generate stereoisomeric products in unequal amounts". Here, the reactant may be a chemical reagent, catalyst, solvent, or physical factor.

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