4-benzhydrylidenenaphthalen-1-one

methylidene triphenyl phosphorane

1-(2-ethoxy-2-oxo-1-(triphenylphosphonio)ethyl)-6-(2-ethoxy-2-oxoethylidene)-4-tritylcyclohexa-2,4-dien-1-olate

{AgBr(triphenylphosphine)2}

butoxy(diphenyl)borane