(Acetonylidenetriphenyl)phosphorane (Acetylmethylene)triphenylphosphine (Acetylmethylene)triphenylphosphorane (Triphenylacetylmethylene)phosphorane (Triphenylphosphoranylidene)-2-propanone 1-(Triphenylphosphoranylidene)-2-propanone 1439-36-7 2-Propanone, (triphenylphosphoranylidene)- 2-Propanone, 1-(triphenylphosphoranylidene)- NSC407394 WLN: 1V1UPR&R&R