8-bromo-7-hydroxy-5-methoxy-2-methyl-4-oxo-4H-benzopyran-6-carboxaldehyde

dimethyl 5-(perfluoroethyl)-6-(triphenylphosphoranylidene)hepta-2,4-dienedioate

dimethyl 5-(perfluoropropyl)-6-(triphenylphosphoranylidene)hepta-2,4-dienedioate

[(2R)-2r-acetylsulfanyl-4-oxo-3c-(2-phenoxy-acetylamino)-azetidin-1-yl]-(triphenyl-λ5-phosphanylidene)-acetic acid 4-nitro-benzyl ester

(E)-(2-(2-ethoxy-2-oxoethyl)-3-(ethoxycarbonyl)-5-(triphenyl-l⁵-phosphanylidene)pent-3-en-1-yl)triphenylphosphonium bromide