Note to moderator: Read answerline carefully. Since its 2005 FDA approval, a prodrug that competes with one of these compounds has been added to chemotherapy regimens to noticeably increase survival from T-cell acute lymphoblastic leukemia. NBMPR inhibits a bidirectional transporter of these compounds, a family of which, exemplified by SLC28, uses a sodium gradient to move these compounds [emphasize] against their concentration. The pancreatic cancer drug gemcitabine is imported by transceptors that act on these (-5[1])compounds, which in humans are classified as either (*) “concentrative” or “equilibrative.” The kinases TK1 and NME triply phosphorylate an antiviral drug resembling one of these (-5[1])compounds with a 3-prime azido group replacing a (10[1])hydroxyl. A family of reverse (-5[1])transcriptase inhibitors, exemplified by (10[1]-5[1])AZT, disrupt DNA (-5[1])replication by acting as analogues of these compounds. For 10 points, name these phosphate-lacking metabolites consisting of a five-carbon sugar and a (10[1])nitrogenous base. (10[6]0[4])■END■