| abstract |
The present invention relates to the use of a compound of the formula (I), wherein X and Y independently of one another are OH, O—(C 1 -C 6 )-alkyl, NH 2 or NH—(C 1 -C 6 )-alkyl, or X and Y together form a group —O— or wherein X and Y together form a further bond between the C atoms to which they are attached; R1 and R2 independently of one another are H, Cl or Br; R3 is H,(C 1 -C 6 )alkyl, C(═O)—(C 1 -C 6 )-alkyl or (C 1 -C 6 )-alkylene-NH—(C 1 -C 6 )-alkyl; R4 is H, (C 1 -C 6 )-alkyl or C(═O)—(C 1 -C 6 )-alkyl, and R5 is methyl or ethyl; or a physiologically tolerable salt of a compound of the formula (I), for the treatment and/or prophylaxis of cancer diseases, a pharmaceutical composition for the treatment and/or prophylaxis of cancer diseases comprising a compound of the formula (I), a compound of the formula (I) and a process for the preparation of the compound (I). |