.beta.-D-Deoxycytidine phosphorothioate 14 mer oligonucleotide [S(dC)14], duplex with Poly(rl) 5'-dC sC sC sC sC sC sC sC sC sC sC sC sC sC-3' and 3'-rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI rI Ir rI rI rI-5' AIDS-004812 AIDS004812 Poly(rl).S(dC)14