(1-(2-bromo-1,3-dioxo-2,3-dihydro-1H-inden-2-yl)-2-methoxy-2-oxoethyl)triphenylphosphonium bromide

(1-(2-bromo-1,3-dioxo-2,3-dihydro-1H-inden-2-yl)-2-ethoxy-2-oxoethyl)triphenylphosphonium bromide

(1-(2-bromo-1,3-dioxo-2,3-dihydro-1H-inden-2-yl)-2-oxo-2-phenylethyl)triphenylphosphonium bromide

(2-Benzoyl-2-bromo-1-methoxycarbonyl-3-oxo-3-phenyl-propyl)-triphenyl-phosphonium; bromide

(3-benzoyl-3-bromo-1,4-dioxo-1,4-diphenylbutan-2-yl)triphenylphosphonium bromide