| abstract |
Compounds of formula In wherein R₁ and R₂, that can be the same or different, are hydrogen, alkyl, aryl, aralkyl groups or, if taken together, cycloalkyl groups; nA is a carbon atom, a residue of 2,3-dioxybutandioic-2,4-dioxyphtalic acid or disubstituted malonic acid derivatives; nn₁ and n₂ are selected in such a manner that the result of their addition is from 2 to 40; nT₁ and T₂ that can be the same or different, are hydrogen, alkyl, benzyl, phenyl, acyl or cycloalkyl or a residue of formulae n n Compounds I are useful as anti-tumour agents in human therapy. |