4-nitro-5-sulphonoamido-1-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)imidazole
4-nitro-5-sulphonoamido-1-(2,3,5-tri-O-benzoyl-α-D-ribofuranosyl)imidazole
5-nitro-4-sulphonamido-1-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)imidazole
4(5)-aminoimidazole-5(4)-sulfonamide