benzene
phenylacetyl azide
diethylphosphinic chloride
α-chloro-benzylisocyanate
phenylacetyl chloride
N-<α-(diethoxyphosphinyl)benzyl>-N'-phenylurea
N-<α-(anilinoethoxyphosphinyl)benzyl>-N'-phenylurea
aniline hydrochloride
4-<<α-(ethoxymorpholinophosphinyl)benzyl>carbamoyl>morpholine
N-<α-(p-chloroanilino)ethoxyphosphinyl>benzyl-N'-(p-chlorophenyl)urea