Antibiotic XK-101-2

7-(β-D-Ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidin-4-ol

7-(β-D-Ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine-4(3H)-one

3,7-Dihydro-7-β-D-ribofuranosyl-4H-pyrrolo[2,3-d]pyrimidin-4-one

1,7-Dihydro-7-β-D-ribofuranosyl-4H-pyrrolo[2,3-d]pyrimidin-4-one