1H-tetrazolium, 5-[(2E)-2-butenyl]-1,4-dimethyl- 5-[(2E)-but-2-en-1-yl]-1,4-dimethyl-1H-tetrazol-4-ium InChI=1/C7H13N4/c1-4-5-6-7-10(2)8-9-11(7)3/h4-5H,6H2,1-3H3/q+1/b5-4