| 摘要 |
<p>Compounds of the formula: < IMG > (I) wherein W is a cyclic ether containing four or five carbon atoms in the ring or radicals of the formulae: < IMG > ,and R1O-CH2-CH2-O-CH2 in which n is 1 or 2; and R1 is hydrogen or -C(O)-R2 where R2 is lower alkyl, aryl, or arylalkyl; and X and Y when taken separately, are each hydrogen or an electron withdrawing group and, when taken together, form a six membered carbocyclic aromatic ring, and salts of the said compounds with acids. The compounds are useful for radiation therapy of tumor cells.</p> |
