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(2007/10/02)1-[2-Oxo-3-(triphenyl-λ5-phosphanylidene)-pentyloxy]-3-(triphenyl-λ5-phosphanylidene)-pentan-2-one
1,1,1-Trifluoro-3-(triphenyl-λ5-phosphanylidene)-pentan-2-one
3-(Triphenyl-λ5-phosphanylidene)-nonan-4-one
1-trimethylsilyl propylidene triphenylphosphorane