1'-Allyl-3',5'-dimethyl-1H,1'H-[3,4']bipyrazolyl-5-carboxylic acid1'-allyl-3',5'-dimethyl-1H,1'H-[3,4'-bipyrazole]-5-carboxylic acid1'-allyl-3',5'-dimethyl-1H,1'H-3,4'-bipyrazole-5-carboxylic acid3-[3,5-dimethyl-1-(prop-2-en-1-yl)-1H-pyrazol-4-yl]-1H-pyrazole-5-carboxylic acid