... parts per million (6) downfield from Mel& with the coupling constants (J) given in ... Elemental analyses were performed by the Analytical Laboratory, College of Chemistry, University of ... Berkeley Field-desorption mass spectra were performed by the Bio-Organic, Biomedical Mass ...
![2-amino-9-[3',5'-bis-O-(tert-butyldimethylsilyl)-2'-deoxy-β-D-erythro-pentofuranosyl]-6-(phenylthio)purine Structure](https://image.chemsrc.com/caspic/403/82995-89-9.png)