Chemical Name: (4aS,6R,8aS)-6-hydroxy-3-methoxy-11,11-dimethyl-4a,5,9,10,11,12-hexahydro-6H-benzo[2,3]benzofuro[4,3-cd]azepin-11-ium iodide;
Synonym: Leflunomide USP Related Compound B
Smile: COC1=C2C([C@]34[C@H](C[C@@H](O)C=C4)O2)=C(C[N+](C)(C)CC3)C=C1.[I-]