| 摘要 |
Novel methods for treatment of neoplastic disease states in animals, which methods comprise administering a therapeutically effective amount of a compound of the formula IV, <IMAGE> IV wherein: Y is hydrogen or lower alkyl; and Z is a radical of the formula -O-R, wherein R is: a substituted lower alkyl radical selected from the group consisting of mono- and di-hydroxy lower alkyl, cyano lower alkyl, halo lower alkyl, lower alkyl amino lower alkyl, hydroxy lower alkylthio lower alkyl, hydroxy lower alkyldithio lower alkyl, di-lower alkoxy lower alkyl, hydroxy or lower alkoxy substituted lower alkoxy lower alkyl, and cyclo lower alkyl substituted lower alkyl; or a lower alkenyl radical; or a lower alkynyl radical; or a substituted or unsubstituted oxygen-containing heterocyclic radical selected from the group consisting of tetrahydro furanyl or lower alkyl substituted derivatives thereof, lower alkyl substituted oxiranyl, lower alkyl substituted dioxolanyl, lower alkyl substituted pyranyl, or lower alkyl substituted furanyl.
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