182048-56-2 4,4',4''-(Phosphinylidynetri-2,1-ethanediyl)tris(1-(phenylmethyl)pyridinium) trichloride Pyridinium, 4,4',4''-(phosphinylidynetri-2,1-ethanediyl)tris(1-(phenylmethyl)-, trichloride Tris(2-(4-(1-benzylpyridinio))ethyl)phosphinoxide trichloride