Late‐Stage Isotopic Carbon Labeling of Pharmaceutically Relevant Cyclic Ureas Directly from CO2. - Del Vecchio, Antonio; Caillé, Fabien; Chevalier, Arnaud; Loreau, Olivier; Horkka, Kaisa; Halldin, Christer; Schou, Magnus; Camus, Nathalie; Kessler, Pascal; Kuhnast, Bertrand; Taran, Frédéric; Audisio, Davide (Angewandte Chemie International Edition, 2018)