methyl 2-(triphenyl-λ⁵-phosphanylidene)pent-4-enoate

benzenesulfonate,methyl(triphenyl)phosphanium

(3-bromophenyl)methyl-triphenylphosphanium,bromide

3-(1-benzothiophen-2-yl)phenol

bis(hydroxymethyl)-diphenylphosphanium,chloride