Ethenone,(triphenylphosphoranylidene)- (9CI); Ketene, (triphenylphosphoranylidene)-(8CI); (Triphenylphosphoranylidene)ethenone;(Triphenylphosphoranylidene)ketene; Bestmann ylide;Ketenylidene(triphenyl)phosphorane; NSC 620573;Oxovinylidenetriphenylphosphorane; Triphenyl(ketenylidene)phosphorane
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