NC57205
Carbamic acid, [2-[[bis(4-methoxyphenyl)phenylmethyl]amino]-9-[2-deoxy-3,5-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-β-D-erythro-pentofuranosyl]-6-(phenylmethoxy)-9H-purin-8-yl](1-methyl-6-phenyl-1H-imidazo[4,5-b]pyridin-2-yl)-, 1,1-dimethylethyl ester