Sanofi SA is acquiring Principia Biopharma Inc. in a $3.68 billion deal that brings Sanofi three clinical-stage BTK inhibitors and simplifies a partnership that began three years ago. Paris-based Sanofi plans to acquire all outstanding Principia common stock shares for $100 each at a $3.36 billion enterprise value. Sanofi will get SAR-442168 (PRN-2246), the brain-penetrant candidate at the heart of the deal. The agreement now gives Sanofi full control of the program, bringing a three-year partnership between the two companies to an end