4-Amino-7-beta-D-arabinofuranosyl-7H-pyrrolo(2,3-d)pyrimidine-5-carbonitrile 7H-Pyrrolo(2,3-d)pyrimidine-5-carbonitrile, 4-amino-7-beta-D-arabinofuranosyl- 90813-71-1 Ara-toyocamycin BRN 4207160