pentetrazol1,5-pentamethylenetetrazole6,7,8,9-tetrahydro-5-azepotetrazole6,7,8,9-tetrahydro-5H-tetrazolo[1,5-a]azepine7,8,9,10-tetrazabicyclo[5.3.0]-8,10-decadienePentetrazolPentylenetetrazolealpha,beta-cyclopentamethylenetetrazolepentamethylene-1,5-tetrazolepentylenetetrazol