Pfizer (NYSE:PFE) is suing Regor Therapeutics, a China-headquartered company that announced a $1.5 billion diabetes alliance with Eli Lilly (NYSE:LLY) in late 2021. Filed in the U.S. District Court for the District of Delaware, Pfizer’s lawsuit also accuses former employees Xiayang Qiu, Min Zhong and 10 unnamed individuals of using its trade secrets as the…