1,3-Diazaspiro(4.4)non-1-en-4-one, 2-butyl-3-((2'-(1H-tetrazol-5-yl)(1,1'-biphenyl)-4-yl)methyl)- 138402-11-6 2-Butyl-3-(p-(o-1H-tetrazol-5-ylphenyl)benzyl)-1,3-diazaspiro(4.4)non-1-en-4-one Avapro BMS 186295 Irbesartan Irbesartan [USAN:INN] SR 47436 SR-47436