DL-Mandelic acid Thiodiacetic acid Dimethyl 2.2`-thiobisacetate Dimethyl thioglycolate N-Methyl-4-diazanylsulfabenzamide 4-Chlorobutanal dimethyl acetal Bromoacetaldehyde dimethyl acetal Bromoacetaldehyde diethyl acetal N,N-diethyl acetamide 4-Acetamidobenzoic acid 1,1,3-Trichloroacetone 2-(2-Thienyl)ethanol / 2-thiopheneethanol thiophene-2-ethylamine / 2-Thiophene ethylamine