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n4google.
isaphttp://webisa.webdatacommons.org/prov/
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Subject Item
isa:380575550
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Base is a purine base; R1 is OH, H, OR3, N3, CN, halogen, CF3, lower alkyl, amino, loweralkylamino, or di(lower)alkylamino; R2 is H, monophosphate, diphosphate, triphosphate, a stabilized phosphate prodrug; acyl, phosphate, phosphonate, a lipid or an amino acid; and R3 is acyl, alkyl, phosphate, or other pharmaceutically acceptable leaving group which when administered in vivo, is capable of being
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isa:380575550