(-)-Neplanocin A 3-Cyclopentene-1,2-diol, 5-(6-amino-9H-purin-9-yl)- 3-(hydroxymethyl)-, [1S-(1.ALPHA.,2.ALPHA.,5.BETA.)]- 3-Cyclopentene-1,2-diol, 5-(6-amino-9H-purin-9-yl)-3-(hydroxymethyl)-, (1S,2R,5R)- NSC316458 Neplanocin A