Importance

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Abstract

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, ##STR1## wherein: Y is hydrogen or lower alkyl; and X 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, cyclo lower alkyl substituted lower alkyl; and lower alkyl substituted dioxolanyl lower alkyl or a lower alkenyl radical; or a lower alkynyl radical; or tetrahydro furanyl or a lower alkyl substituted derivative thereof, oxiranyl lower alkyl, tetrahydropyranyl lower alkyl, or furanyl lower alkyl.

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First Claim