Studies on neplanocin A, new antitumor antibiotic. II. Structure determination

The structure and stereochemistry of neplanocin A was determined on the basis of its spectral and chemical evidences as [1R-(la,2a,3b)]-3-(6-amino-9-yl)-5-(hydroxy-methyl)-4-cyclopentene-1,2-diol. For the final proof of the structure, X-ray crystallographic analysis of neplanocin A was carried out.