<prompt> Oral anticoagulant which inhibit thrombin directly-DabigatranDicumarolWarfarinRivaroxaban  <response>: Ans. is a i.e., Dabigatran Parentral direct thrombin inhibitors o Argatrobano Hirudino Bivalirudino Lepirudino Melagatran o Desirudin Oral direct thrombin inhibitors o Dabigatran recento Ximelagatran withdrawn 