white blotter using a superior degree of purityThe molecular construction of chlordiazepoxide, the 1st benzodiazepine, marketed by Hoffmann–La Roche commencing in 1960 and branded as Librium The first benzodiazepine, chlordiazepoxide (Librium), was synthesized in 1955 by Leo Sternbach though Doing the job at Hoffmann–La Roche on the development