(Carbomethoxymethylene)triphenylphosphorane (Triphenylphosphoranylidene)acetic acid methyl ester 2605-67-6 Acetic acid, (triphenylphosphoranylidene)-, methyl ester Methyl triphenylphosphoranylideneacetate NSC117573 Triphenyl(carbomethoxymethylene)phosphorane [(Methoxycarbonyl)methylene]triphenylphosphorane