abstract |
This invention is concerned with novel polycyclic compounds of formula [I], n n nwherein ring A, ring B, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , X, Y, R 1′ , R 2′ , R 3′ , R 4′ , R 5′ , R 6 ′, ring A′, ring B′ and X′ are as defined hereinabove as well as pharmaceutically acceptable salts thereof. The compounds have anti-tumor activity and are useful for the treatment of cell proliferative disorders. |