What is the relationship between 'Sanofi' and 'Regeneron Pharmaceuticals' in the context of the input sentence.
Options: legal form, owner of, founded by, director/manager

In a separate report earlier this week, ICER said its analyses found that two new cholesterol drugs, Repatha from Amgen Inc and Praluent from partners Sanofi SA and Regeneron Pharmaceuticals Inc, should be sold at a 67 percent discount from list prices.
owner of