| abstract |
The invention relates to compounds having the following formula (I), in which: Ra represents a sugar moiety, an arylamino group, or an alkyl group comprising at least one amino group, Rb represents an halogen atom, an halogenoalkyl group, a nitro group, or a group -NR(COR') in which R and R', independently from each other, represent an alkyl group, R1 represents H, or a protecting group for COOH group, R2, R3, and R4, independently from each other, represent H, or a protecting group for OH group. The invention also relates to the use of such compounds in pharmaceutical compositions for the treatment of cancers. |