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

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