ethyl 5-(4-methoxyphenyl)-3-oxo-2-triphenylphosphoranylidenepent-4-ynoate

3-diazo-1,1,1-trifluoro-2,4-pentanedione

3-diazo-1,1,1-trifluoro-2,4-octanedione

2,4-Hexanedione, 3-diazo-1,1,1-trifluoro-5,5-dimethyl-

3-diazo-1,1,1-trifluorononane-2,4-dione