LONDON – C4X Discovery Holdings plc has out-licensed its preclinical oral interleukin-17 (IL-17) inhibitor to Sanofi SA in a potential €414 million (US$493.4 million) deal. Under the terms of the agreement, Sanofi is paying €7 million up front and a further €11 in short-term preclinical milestones, with the balance to follow on reaching development, regulatory and commercialization milestones.