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DeMethyl Irbesartan Irbesartan Impurity-II Irbesartan Impurity (Demethyl Irbesartan) Irbesartan Impurity 8 (Demethyl Irbesartan) 3-((2'-(1H-Tetrazol-5-Yl)-[1,1'-Biphenyl]-4-Yl)Methyl)-2-Propyl-1,3-Diazaspiro[4.4]Non-1-En-4-One 1,3-Diazaspiro[4.4]non-1-en-4-one, 2-propyl-3-[[2'-(2H-tetrazol-5-yl)[1,1'-biphenyl]-4-yl]methyl]- 3-((2-(1H-Tetrazol-5-Yl)-[1,1-Biphenyl]-4-Yl)Methyl)-2-Propyl-1,3-Diazaspiro[4.4]Non-1-En-4-One(WXC02339) Irbesartan impurity 2/Demethyl Irbesartan/Irbesartan Propyl Analog/2-Propyl-3-[[2-(2H-tetrazol-5-yl)[1,1-biphenyl]-4-yl]methyl]-1,3-diazaspiro[4.4]non-1-en-4-one