4-amino-5-bromo-7-(5-azido-5-deoxy-2,3-O-isopropylidene-β-D-ribofuranosyl)pyrrolo[2,3-d]pyrimidine

4-chloro-5-iodo-7-(5-azido-5-deoxy-2,3-O-isopropylidene-α-D-ribofuranosyl)pyrrolo[2,3-d]pyrimidine

4-amino-5-iodo-7-(5-azido-5-deoxy-2,3-O-isopropylidene-β-D-ribofuranosyl)pyrrolo[2,3-d]pyrimidine

(2R,3S,4R,5R)-2-Azidomethyl-5-(5-phenyl-4-phenylamino-pyrrolo[2,3-d]pyrimidin-7-yl)-tetrahydro-furan-3,4-diol