There are provided compounds of the formula
wherein X, Y and R
1
to R
8
are as described herein and the enantiomers and pharmaceutically acceptable salts and esters thereof which compounds have anticancer activity.
提供了具有抗癌活性的化合物,其
化学式为其中X、Y和R1至R8如此描述,并且这些化合物的对映体、药用可接受的盐和酯。