2'-DCF 2'-Dexoycoformycin 53910-25-1 CI-825 CL 67310465 Co-V Co-Vidarabine Covidarabine Deaminase inhibitor Imidazo[4,5-d][1,3]diazepin-8-ol, 3-(2-deoxy-.beta.-D-erythro-pentofuranosyl)-3,6,7,8- tetrahydro-, (R)- NSC218321 PD-ADI PENTOSTATIN Vira A deaminase inhibitor