| 摘要 |
The present invention provides lysine based compounds of the formula; and when the compound of formula I comprises an amino group, pharmaceutically acceptable ammonium salts thereof, wherein R<SUB>1 </SUB>may be, for example, (HO)<SUB>2</SUB>P(O)-, (NaO)<SUB>2</SUB>P(O)-, alkyl-CO- or cycloalkyl-CO-, wherein X may be, for example, F, Cl, and Br, and wherein R<SUB>2 </SUB>and R<SUB>3 </SUB>are as defined herein.
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