K-55 (2,4,6,8-tetranitro-2,4,6,8-tetraazabicyclo [3,3,0]-octanone-3, tetranitrosemiglycouril or keto-bicyclic HMX) (CAS 130256-72-3);
K-55 (2,4,6,8-tetranitro-2,4,6,8-tetraazabiciklo [3,3,0]-oktanon-3, tetranitroszemiglikouril vagy keto-biciklikus HMX) (CAS 130256-72-3);