s-triazolo(1,5-a)pyrimidine, 5-(1-piperidinyl)-7-propyl-6-((2'-(1H-tetrazol-5-yl)(1,1'-biphenyl)-4-yl)methyl)-

4-(1-piperidyl)-2-propyl-3-[[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]meth yl]-1,5,7,9-tetrazabicyclo[4.3.0]nona-2,4,6,8-tetraene