ilmetilbifenilcarboxílico alcoxiimidazol-1-crystalline form of an acid

The invention provides a crystalline freebase form of 4′-{2-ethoxy-4-ethyl-5-[((S)-2-mercapto-4-methylpentanoylamino)methyl]imidazol-1-ylmethyl}-3′-fluorobiphenyl-2-carboxylic acid. This invention also provides pharmaceutical compositions comprising the crystalline compound, processes and intermediates for preparing the crystalline compound, and methods of using the crystalline compound to treat diseases such as hypertension.