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2,4-Dichlorobutyrophenone

Diethyl cromoglycate

1,4-dichloro-2-butyne

3-De[(2,6-dideoxy-3-C-methyl-3-O-methyl-a-L-ribo-hexopyranosyl)oxy]-10,11-didehydro-11-deoxy-6-O-methyl-3-oxo-erythromycin 2-acetate

Diethyl chlorothiophosphate

Diethyl chlorophosphate

trans-1,4-Dichloro-2-butene