N-Nitro-1,2,3,4-tetradehydro Argatroban-d8 is the isotope labelled analog of N-Nitro-1,2,3,4-tetradehydro Argatroban (N565115); a useful synthetic intermediate in the preparation of Argatroban (A769000) which is a synthetic thrombin inhibitor and antithrombotic.