| abstract |
The invention relates to the use of compounds of formula (I): wherein X is —C(O)—, —C(S)—, —C═NOH, or —CH(R 7 )— wherein R 7 is hydrogen, hydroxy, C 1-7 alkoxy, —OR 8 or —NR 8 R 9 (wherein R 8 is a group —Y 1 R 10 (wherein Y 1 is a direct bond, —C(O)—, —C(S)—, —S—, —C(O)O, —C(O)NR 11 —, —SO 2 — or —SO 2 NR 12 — (wherein R 11 and R 12 , which may be the same or different, each independently represents hydrogen, C 1-3 alkyl or C 1-3 alkoxyC 2-3 alkyl) and R 10 is as defined herein, and R 9 includes hydrogen; R 1 , R 2 and R 3 are as defined herein and are preferably methyl; R 4 , R 5 and R 6 are as defined herein with the proviso that R 5 is not hydroxy, alkoxy, substituted alkoxy, —OPO 3 H 2 , —O—C 1-7 alkanoyl or benzyloxy; and salts thereof in the manufacture of a medicament for use in the production of a vascular damaging effect in warm-blooded animals such as humans. The present invention further relates to compounds of the formula (I), pharmaceutical compositions containing them, processes for their preparation and to a method of treatment using the compounds to produce a vascular damaging effect in a warm-blooded animal such as a human. The compounds of formula (I) and the pharmaceutically acceptable salts thereof may be useful in the treatment of a number of disease states including cancer and rheumatoid arthritis. |