Medchemexpress, HY-15405 100mg Teriflunomide A 77-1726 CAS:163451-81-8 Formula:C12H9F3N2O2 Purity:98% Teriflunomide is the active metabolite of leflunomide, which inhibits pyrimidine de novo synthesis by blocking the enzyme dihydroorotate dehydrogenase, used as an immunomodulatory agent. Medchemexpress has over 10000 novel life-science reagents, reference compounds, APIs and natural compounds for laboratory and scientific use. Other quantity can also be offered.