2,4,4,6,8,8-Hexachloro-N~2~,N~6~-dimethyl-N~2~,N~6~-diphenyl-1,3,5,7,2.lambda.~5~,4.lambda.~5~,6.lambda.~5~,8.lambda.~5~-tetraazatetraphosphocine-2,6-diamine 7460-32-4 AIDS-125021 AIDS125021 NSC58918