Irbesartan Dimer Impurity

Chemical Name: 3-((2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)methyl)-2-(1-(2'-(1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)pentan-2-yl)-1,3-diazaspiro[4.4]non-1-en-4-one

Synonym: penilloic acids of flucloxacillin