4(5)-(2-bromoethyl)imidazole hydrobromide

ethyl 3-trityl-3H-thieno(2,3-d)imidazole-5-carboxylate

triphenylmethyl 4-oxopentanoate

氰基甲酸乙酯

2-acetamido-2-deoxy-1,3-di-O-acetyl-α-D-galactopyranose