Effective February 17, 2017, Sigma-Tau Pharmaceuticals, Inc. has changed its name to Leadiant Biosciences, Inc. Leadiant Biosciences, Inc. is a rare corporation dedicated to creating novel medicines for the unmet needs of patients with rare diseases. Truly unique in its field, Leadiant Biosciences places its considerable scientific resources behind the discovery of compounds that benefit the few. Simply because it's the right thing to do.