Hence there are strong factory groups in companies like BASF, Bayer, Clariant, Evonik, Henkel, Merck, Roche Diagnostics, Sanofi Aventis or Wacker.
Buserelin acetate is marketed by Sanofi-Aventis under the brand name Suprefact and a generic form of Buserelin is now produced by CinnaGen under the brand name CinnaFact.
Since then Lewent has also been responsible for Merck's collaboration with Johnson & Johnson in a consumer pharmaceuticals joint venture, for the setting up of the animal health company Merial (a joint venture with the French pharmaceutical company Sanofi-Aventis), and for Merck's ongoing relationships with AstraZeneca and DuPont.
Ombrabulin is an experimental drug candidate discovered by Ajinomoto and under development by Sanofi-Aventis.
Z drugs emerged in the last years of the 1980s and early 1990s, with zopiclone (Imovane) approved by the NHS as early as 1989, quickly followed by Sanofi and zolpidem (Ambien).