| abstract |
The present invention relates to certain compounds of the formulan n n <Formula>n n n n n n n n Wherein R 1 represents a lower alkyl radical;n n n R 2 , R 3 , R 4 and R 5 independently represent H, halo radicals or OSO 2 R 10 ;n n n R 6 , R 7 , R 8 , R 9 and R 10 represent a variety of different groups.n n n The topoisomerase inhibitory compounds are particularly useful as anticancer drugs. |