Cheiron, the operating system for drug programs, announced an $8 million seed round led by Menlo Ventures, with the backing and strategic support of industry veterans including Moderna co-founder and MIT Institute Professor Robert Langer; former Pfizer Chief Medical Officer Freda Lewis-Hall; Chai Discovery co-founder and CEO Josh Meier; former Starbucks CEO Laxman Narasimhan; and former Apple AI chief John Giannandrea.