[(4-Methoxy-benzoyl)-cyan-methylen]-triphenylphosphoran

[(4-Nitro-benzoyl)-cyan-methylen]-triphenylphosphoran

3-(4-ethoxyphenyl)-3-oxo-2-(triphenyl-l⁵-phosphanylidene)propanenitrile

1-cyano-1-(trimethylphosphonio)prop-1-en-2-olate

硒化三苯膦