4-ethoxy-1,3,6-triphenyl-1,4-dihydro-[1,2,4]diazaphosphinine 4-oxide
4-ethoxy-3-(4-nitro-phenyl)-1,6-diphenyl-1,4-dihydro-[1,2,4]diazaphosphinine 4-oxide
2,2-Diethoxy-2-(2'-phenylethynyl)-4,5-diphenyl-4,5-dicyano-1,3,2-dioxaphospholane
O-ethyl-S-p-nitrophenyl-2-phenylethynylthiophosphonate
phenylacetylene