bis(2,3,4,5,6-pentachlorophenyl) but-2-enedioate

bis(2,2,2-tribromoethyl) (E)-but-2-enedioate

ditert-butyl (E)-but-2-enedioate

1-(6-hydroxy-4,7-dimethoxy-2,3-dihydro-1-benzofuran-5-yl)ethanone

2,3-dibromobutanedioyl dichloride