| 摘要 |
Compounds of the formula, I, <IMAGE> I wherein: Y is hydrogen or lower alkyl; and X is a thiazolamino radical, a furfurylamino radical or a radical of the formula, <IMAGE> in which R, R1, and R2 are the same or different and selected from the group consisting of hydrogen and lower alkyl, and R3 is selected from the group consisting of lower alkenyl, halo-lower alkenyl, lower alkynyl, lower akloxycarbonyl, thienyl, formamyl, tetrahydrofuryl and benzene sulfonamide. Also disclosed are novel methods for treatment of neoplastic disease states in animals, which methods comprise administering a therapeutically effective amount of a compound of the formula, Ia, <IMAGE> Ia wherein: Y is hydrogen or lower alkyl; and Z is a thiazolamino radical, a furfurylamino radical, a cyclopropylamino radical, a pyridylamino radical, or a radical of the formula, <IMAGE> in which R4, R5, and R6 are the same or different and selected from the group consisting of hydrogen and lower alkyl, and R7 is selected from the group consisting of lower alkenyl, halo-lower alkenyl, lower alkynyl, lower alkoxycarbonyl, halo-lower alkyl, hydroxy-lower alkyl, pyridyl, thienyl, formamyl, tetrahydrofuryl, benzyl, and benzene sulfonamide.
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