Cadeguomycin

2-Amino-4,7-dihydro-4-oxo-7-β-D-ribofuranosyl-1H-pyrrolo[2,3-d]pyrimidine-5-carboxylic acid

2-Amino-3,4-dihydro-4-oxo-7-β-D-ribofuranosyl-7H-pyrrolo[2,3-d]pyrimidine-5-carboxylic acid