文摘
Established pharmaceutical products often have complex supplychains and regulatory histories. In Europe the EuropeanDirectorate for the Quality of Medicine (EDQM) (informationfrom European Pharmacopoeia website, http://www.pheur.org/)have promoted the use of certificates of suitability of theEuropean Pharmacopoeia to ensure the quality of medicinesby a commonly recognised set of standards, allowing the freemovement of medicinal products in member states. Thiscontribution describes the analytical and synthetic chemistryrequired to synthesise the impurities of manufacture of clobetasone butyrate.