1H-tetrazole, 5-[(2E)-4,4-dimethyl-2-pentenylidene]-4,5-dihydro-1,4-dimethyl- 5-[(2E)-4,4-dimethylpent-2-en-1-ylidene]-1,4-dimethyl-4,5-dihydro-1H-tetrazole InChI=1/C10H18N4/c1-10(2,3)8-6-7-9-13(4)11-12-14(9)5/h6-8H,1-5H3/b8-6