| 摘要 |
<p>Novel mono- and dihydroxy phenylethylamine derivatives useful in treating melanoma are provided having the formulae (Ia, Ib or Ic). In the above formulae, Ra is hydrogen or -COORb, Rb is hydrogen or C¿1-6? alkyl; R?e and Re¿ independently represent hydrogen and hydroxy, Rf is hydrogen, C¿1-4? alkyl or halogen, X is -CHOH-, -CH2-oxygen or sulphur, m is zero or 1, W is oxygen or sulphur, and -ODrug, -NHDrug and -N(Drug)2 each represent a residue of a therapeutically active agent. The above compounds are prodrugs which are inactive until metabolised by enzymes expressed by host melanoma cells. The invention allows a greater amount of active agent to be used while reducing systemic side effects.</p> |
