1-methyl-5,6-dihydro-1H-pyrrolo[1,2-d]tetrazole 1H-pyrrolo[1,2-d]tetrazole, 5,6-dihydro-1-methyl- InChI=1/C5H8N4/c1-8-5-3-2-4-9(5)7-6-8/h3H,2,4H2,1H