Synonyms: 1-Oxa-4,6,8,10-tetraaza-5,7,9-triphospha(5-PV)spiro[4.5]deca-5,7,9-triene,7,7,9,9-tetrachloro-7,7,9,9-tetrahydro-; 1-Oxa-4,6,8,10-tetraaza-5l5,7,9-triphosphaspiro[4.5]deca-5,7,9-triene,7,7,9,9-tetrachloro-7,7,9,9-tetrahydro- (9CI); NSC 139814