The present invention relates to spiroindolinone derivatives of the formula
and their enantiomers and pharmaceutically acceptable salts and esters thereof wherein R
1
, R
2
, R
3
, R
4
, R
5
, R
6
, R
7
and R
8
, are as herein described.
The compounds have utility as antiproliferative agents, especially, as anticancer agents.
There are provided compounds of the formula
or a pharmaceutically acceptable salt or ester thereof wherein X, Y, R1, R2 are as herein described.
The compounds have utility as antiproliferative agents, especially, as anticancer agents.