s-triazolo(1,5-a)pyrimidin-5(1H)-one, 7-ethyl-6-((2'-(1H-tetrazol-5-yl) (1,1'-biphenyl)-4-yl)methyl)-

2-ethyl-3-[[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]methyl]-1,5,7,9-tetra zabicyclo[4.3.0]nona-2,5,7-trien-4-one