2-butyl-3,6,7,8,9,11-hexahydro-6,9-dimethyl-3-((2'-(1H-tetrazol-5-yl)(1,1'-biphenyl)-4-yl)methyl)-6,9-ethano-4H-imidazo(4,5-d)pyridazino(1,2-a)pyridazin-4-one
2-butyl-3,6,7,8,9,11-hexahydro-6,9-dimethyl-3-((2'-(1h-tetrazol-5-yl)(1,1'-biphenyl)-4-yl)methyl)-6,9-ethano-4h-imidazo(4,5-d)pyridazino(1,2-a)pyridazin-4-one