Patent ID: 8212051
Filing Date: 2012-07-03
Classification: C07D

Abstract:
1. A crystalline hydrobromide acid addition salt of 2-n-butyl-3-[[2′-(tetrazol-5-yl)biphenyl-4-yl]methyl]-1.3-diazaspiro[4.4]non-1-en-4-one having an X-ray diffraction pattern at the following 2-theta values: 8.1, 11.6, and 22.9±0.2° or characterized by X-ray diffraction pattern as presented in or characterized by diffractions in X-ray diffraction pattern at the following 2-theta values: 7.2, 8.1, 11.6, 12.2, 12.7, 13.2, 19.8, 21.9, and 22.9±0.1°.