133635-58-2 (2S-TRANS) 133697-40-2 2',3'-Dideoxy-5'-O-(4-methylbenzoyl)-5-pentyloxymethyluridine 2',3'-Dideoxyuridine deriv. AIDS-002859 AIDS002859 Thymidine, 3'-deoxy-.alpha.-(pentyloxy)-, 5'-(4-methylbenzoate)