9-((2R,3R,3aS,9aR)-3-Azido-5,5,7,7-tetraisopropyl-tetrahydro-1,4,6,8-tetraoxa-5,7-disila-cyclopentacycloocten-2-yl)-6-chloro-9H-purine

2'-azido-6-chloro-2'-deoxyadenosine