octogen [ HMX,1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane,beta-1,3,5,7-tetranitro-1,3,5,7-tetraazacyclooctane,cyclotetramethylene-tetranitramine,cyclotetramethylenetetranitramine,octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine ] an explosive compound, contaminant in waste water; structure given in third source