Teriflunomide might not be the same as A77 1726 contrary to Drugs of the Future PubChem has an i d 5479847 for teriflunomide calling it the active metabolite of leflunomide with a link to the MeSH entry on A77 1726 and an i d 16760239 for A77 1726 which s the active metabolite of leflunomide according to the Wikipedia article A77 1726 I removed the references to the identity of teriflunomide and A77 1726 on Leflunomide and Therapies under investigation for multiple sclerosis as well