dibutoxy(1,3,3,3-tetrachloropropyl)borane

4-hydroxy-4-pyridin-2-ylbutan-2-one

1,3-bis(4-bromophenyl)urea

diethyl 2-chloro-2-(2,2,2-trichloroethyl)pentanedioate

(Z)-2,3-二羟基-2-丙烯醛