5-chloro-1,2,4-thiadiazole
 ethyl 5-chloro-1,3,4-thiadiazole-2-carboxylate
 tert-butyl 2-oxopiperidine-1-carboxylate
 4-oxocyclohexanecarbonitrile
 3-chloropyrazine-2-carboxylic acid
 3-hydroxypyrazine-2-carboxamide
 methyl 3-iodopyrazine-2-carboxylate
 3-iodopyrazine-2-carboxylic acid
 3-chloropyrazine-2-carboxamide
 5-bromo-2-phenylthiazole
 5-bromo-3-phenyl-1,2,4-oxadiazole
 (S)-2-(2,2-dimethyl-1,3-dioxolan-4-yl)propan-2-ol
 METHYL-2-AMINOOXAZOLE-5-CARBOXYLATE
 Methyl (S)-5-oxotetrahydrofuran-2-carboxylate