(4-Nitrophenyl)methyl (2′′S,3β,4′S,5′′R)-3-(benzoyloxy)-4′′,5′′,6′′,7′′,16,17-hexahydro-4′,5′′-dimethylspiro[androsta-5,16-dieno[16,17-b]furan-5′(4′H):2′′-[2H]azepine]-1′′(3′′H)-carboxylate

(3aR,4S,6R,6aR)-6-(6-Amino-9H-purin-9-yl)-4-[[[(1,1-dimethylethyl)diphenylsilyl]oxy]methyl]tetrahydrofuro[3,4-d]oxazol-2(3H)-one

7-Oxa-6-thia-2,5-diazaoctanoic acid, 8-[(3aR,4R,6R,6aR)-6-(6-amino-9H-purin-9-yl)hexahydrofuro[3,4-d]oxazol-4-yl]-3-(2-methylpropyl)-4-oxo-, 1,1-dimethylethyl ester, 6,6-dioxide, (3S)-