2(1H)-Pyrimidinone, 4-amino-1-(2-deoxy-beta-L-erythro-pentofuranosyl)- 4-Amino-1-(2-deoxy-beta-L-erythro-pentofuranosyl)pyrimidin-2(1H)-one 40093-94-5 L-Deoxycytidine L-dC NV-02C Torcitabine Torcitabine[USAN]