Summary：Tylosin, also known as Tai, tylosin, is a macrolide antibiotic which is obtained from Streptomyces fradiae culturemedium in USA in 1959.
Summary：The synthesis of amantadine begins with halogenation of adamantane and bromine, and then the intermediate products react with acetonitrile in sulfuric acid to get amide.
Keywords： β-agonist;Animal Tissues;Cleanert® PCX;
Summary：β-agonist, as one kind of chemosynthetic phenylethanolamines, was mainly used for the prevention and treatment of bronchial asthma and spasm for humans and animals at early stage,
Summary：Tilmicosin is a relatively new special macrolide antibiotic for livestock with tylosin for semi synthetic precursor. The British Elanco animal health care products company was the first one to develop the medicine successfully in 1980s.
Summary：Fluoroquinolones, also called the pyridine acid class, are a series of new synthetic sterilization antimicrobial drugs in recent years.
Summary：The Determination of Tetracyclines Drug Residues in Pork and Chicken
Summary：Lincomycin is mainly obtained by fermentation of streptomyces. It is often used in the 50S subunit of the bacterial ribosome, inhibiting bacterial protein synthesis by extending the inhibitory peptide.