1-Butanamine, N,N',N''-[phosphinothioylidynetris(methylene)]tris[N-butyl- 74038-23-6 NSC222427 Phosphine sulfide, tris(dibutylaminomethyl)- Tris(di-N-butylaminomethyl)phosphine sulfide WLN: 4N4&1PS&1N4&4&1N4&4