has role independent continuant purine 2'-deoxyribonucleoside antineoplastic agent immunosuppressive agent organochlorine compound cladribine CHEBI:567361 2'-Deoxyadenosine in which the hydrogen at position 2 on the purine ring has been substituted by chlorine. It inhibits the synthesis and repair of DNA, particularly in lymphocytes and monocytes, and is used as an antimetabolite antineoplastic drug for the treatment of lymphoid malignancies including hairy-cell leukaemia and chronic lymphocytic leukaemia. anti-anaemic agent