| 摘要 |
A quinazoline of the formula:- <CHEM> wherein R<1> is alkyl, cycloalkyl, alkenyl, alkynyl, alkoxy, alkylthio, aryl, aryloxy, arylthio, arylalkyl, halogeno, hydroxy or mercapto, or substituted alkyl or alkoxy; wherein R<2> is hydrogen, alkyl, alkenyl or alkynyl, or substituted alkyl or alkanoyl; wherein Ar is phenylene, naphthylene or heterocyclene which is unsubstituted or bears one or more substituents; wherein R<3> is such that R<3>-NH2 is an amino acid; wherein R<4> is hydrogen or alkyl; wherein R<5> is hydrogen or alkyl; and wherein each of R<6>, R<7> and R<8> is hydrogen, hydroxy, alkyl, alkoxy, alkylthio, alkylamino, dialkylamino, phenyl, halogeno, nitro, cyano or amino, or substituted alkyl, alkoxy or alkylthio; provided that at least one of R<4>, R<5>, R<6>, R<7> and R<8> is other than hydrogen; or a pharmaceutically-acceptable salt or ester thereof. The compounds possess anti-tumour activity.
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