550-33-4 9-(.Beta.-D-Ribofuranosyl)purine 9-.Beta.-Ribofuranosylpurine 9-Purine ribonucleoside 9H-Purine, 9-.beta.-D-ribofuranosyl- 9H-Purine, 9.beta.-D-ribofuranosyl- AIDS-026798 AIDS026798 Isopurine, ribosyl- NSC65423 Nebularin E) Nebularine Purine ribonucleoside Purine riboside Purine, ribosyl- Purinosine Ribosylpurine