In 2007, Sanofi-Aventis expanded on Aventis' prior relationship with Regeneron Pharmaceuticals; in the new deal Sanofi-Aventis agreed to pay Regeneron $100 million each year for five years, under which Regeneron would use its monoclonal antibody discovery platform to create new biopharmaceuticals, which Sanofi-Aventis gained the exclusive right to co-develop.