2'-Deoxycytidine-N3-cyanoborane

The structure of the P2 1 2 1 2 1 form of 2'-deoxycytidineN3-cyanoborane, C 10 H 15 BN 4 O 4 , has been determined. The sugar is in the 2 E puckering mode and the C5'-05' bond has a tg conformation while the relative orientation of the sugar and the base remains anti.