1-butyl-3-ethyl-5-[[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]methyl]pyrazole-4-carboxylic acid 1-butyl-3-ethyl-5-[[4-[2-(2H-tetrazol-5-yl)phenyl]phenyl]methyl]-4-pyrazolecarboxylic acid 1-butyl-3-ethyl-5-[4-[2-(2H-tetrazol-5-yl)phenyl]benzyl]pyrazole-4-carboxylic acid 1-butyl-3-ethyl-5-[[4-[2-(2H-1,2,3,4-tetrazol-5-yl)phenyl]phenyl]methyl]pyrazole-4-carboxylic acid