prov:value
| - An exemplary N3??????P5??? thiophosphoramidate intersubunit linkage has the formula: where B is a purine or pyrimidine or an analog thereof, Z is OR, SR, or methyl, wherein R is selected from the group consisting of hydrogen, alkyl, and aryl and their salts; and R1 is selected from the group consisting of hydrogen, O???R2, S???R2, and halogen, wherein R2 is H, alkyl, or (CH2)nW(CH2)mH, where n is
|