title: Nucleic acids. 16. Orally active derivatives of ara-cytidine.
abstract: Water-soluble derivatives of ara-cytidine (cytarabine, Cytosar) were prepared and tested for antitumor, immunosuppressive, and antiarthritic activities in animals after oral administration. The compounds tested included the 5'-palmitate, 5'-benzoate, and 5'-adamantoate esters of ara-cytidine, made water soluble by use of their hydrochloride salts of peptidyl derivatives, and two basic 5' esters (5'-nicotinoate and 5'-quinuclidinate) as their hydrochloride salts. Five of the compounds had antitumor activity superior to that found with ara-cytidine itself after oral administration in the L1210 leukemic mouse assay. One of these, 5'-adamantoyl-ara-cytidine hydrochloride, had antitumor activity after oral administration approaching that achieved with parenterally administered ara-cytidine.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D000893:Anti-Inflammatory Agents / Q000138:chemical synthesis / Q000627:therapeutic use; D003561:Cytarabine / Q000008:administration & dosage / Q000031:analogs & derivatives* / Q000138:chemical synthesis / Q000627:therapeutic use; D004681:Encephalomyelitis, Autoimmune, Experimental / Q000188:drug therapy; D007166:Immunosuppressive Agents / Q000138:chemical synthesis / Q000627:therapeutic use; D007939:Leukemia L1210 / Q000188:drug therapy; D051379:Mice; D051381:Rats
chemical_list: D000893:Anti-Inflammatory Agents; D007166:Immunosuppressive Agents; D003561:Cytarabine