| abstract |
Compounds of formula I <CHEM> wherein R1 and R2, that can be the same or different, are hydrogen, alkyl, aryl, aralkyl groups or, if taken together, cycloalkyl groups; A is a carbon atom, a residue of 2,3-dioxybutandioic-2,4-dioxyphtalic acid or disubstituted malonic acid derivatives; n1 and n2 are selected in such a manner that the result of their addition is from 2 to 40; T1 and T2 that can be the same or different, are hydrogen, alkyl, benzyl, phenyl, acyl or cycloalkyl or a residue of formulae <CHEM> Compounds I are useful as anti-tumour agents in human therapy. |