LONDON – Enara Bio Ltd. has landed the first major deal around its dark antigen technology platform, signing up Boehringer Ingelheim GmbH in an agreement worth a potential €876 million (US$1.06 billion). Reaching that figure would require a product to make it to market. More immediately, Enara is getting an up-front payment, research and preclinical milestones for each of up to three tumor types explored in the partnership.