120401-29-8
7-[5-O-[(1,1-dimethylethyl)dimethylsilyl]-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-4-(methylthio)-7H-pyrrolo[2,3-d]pyrimidine
→
120401-34-5
4-(methylsulfonyl)-7-(β-D-ribofuranosyl)-7H-pyrrolo[2,3-d]pyrimidine