SK Biopharmaceuticals inked an exclusive global licensing agreement worth $571.5 million with Full-Life Technologies, gaining the latter’s radionuclide drug conjugate (RDC) candidate FL-091. As hinted last month, this marks SK Biopharm’s debut in the radiopharmaceutical space.With ambitions of blooming into a ‘Big Biotech’, SK Biopharm will “further unveil and implement business plans for radiopharmaceutical therapy this year, and actively pursue clinical development and commercialization in the near future,” said chief executive Donghoon Lee. Under the deal announced Tuesday, SK Biopharm will acquire worldwide R&D, production and commercialisation rights to FL-091 and its back-up compounds. FL-091 is a small-molecule radioligand vector designed to deliver targeted radiotherapy to neurotensin receptor 1-positive (NTSR1+) solid tumours, including colorectal, prostate, and pancreatic cancers.It has demonstrated promising biodistribution, NTSR1-binding affinity and antitumour activity in preclinical studies. According to Full-Life, the development of an alpha-emitter therapy 225Ac-FL-091 is currently under way. Moreover, SK Biopharm holds the right of first negotiation to license additional pre-selected RDC programmes. Meanwhile, Full-Life stands to receive an undisclosed upfront payment, alongside payments on development and commercial milestones, and sales royalties.