CAS 115479-39-5 7H-Pyrrolo[2,3-d]pyrimidine, 4-chloro-7-[5-O-[(1,1-dimethylethyl)dimethylsilyl]-2,3-O-(1-methylethylidene)-beta-D-ribofuranosyl]- (HCID 46783418)|Huagongshe