136042-19-8 2-Butyl-3-((2'-(1H-tetrazol-5-yl)biphenyl-4-yl)methyl)-3H-imidazo(4,5-b)pyridine 3H-Imidazo(4,5-b)pyridine, 2-butyl-3-((2'-(1H-tetrazol-5-yl)(1,1'-biphenyl)-4-yl)methyl)-, sodium salt FK 739 FK-739