Catalysis is not usually necessary in laboratory syntheses. They used mercury compounds as catalysts in their syntheses. In addition, several enantioselective syntheses of amphetamine have been developed. This reactivity is widely applied in the industrial syntheses of pharmaceutical compounds. Vancomycin biosynthesis occurs via different nonribosomal protein syntheses (NRPSs). Other publications with comparable amounts of detail include "Organic Syntheses" and "Inorganic Syntheses". Chemical syntheses of pregabalin have been described. Several syntheses of the pyrrole ring have been described. Chemical syntheses of progesterone have been published. There are many laboratory syntheses of uracil available. Chemical syntheses of stanozolol have been published. It is a colorless crystalline solid used in drug syntheses and plastics manufacture. Chemical syntheses of dydrogesterone have been published. Chemical syntheses of norethisterone have been published. Chemical syntheses of CPA have been published.