prov:value
| - te, diphosphate, triphosphate, or a stabilized phosphateprodrug, acyl, or phosphate, phosphonate, a lipid or an amino acid; and R.sup.3 is acyl, alkyl, phosphate, or other pharmaceutically acceptable leaving group which when administered in vivo, is capable of being cleaved to thc parent compound, or apharmaceutically acceptable salt thereof, optionally in combination with a pharmaceutically accep
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