1-Oxyl-2,2,6,6-tetramethyl-4-piperidyl-N,N,N',N'-bis(ethylene)phosphorodiamidothioate 1-Piperidinyloxy, 4-((bis(1-aziridinyl)phosphinothioyl)oxy)-2,2,6,6-tetramethyl- 51526-59-1 NSC 251787 SL-O-TT