| abstract |
The present invention relates to a compound represented by formula (I), a pharmaceutically acceptable salt, ester, solvate or stereoisomer thereof. In the formula, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , X, A, and B have the same meanings as defined in the description. The present invention also provides a method for producing these compounds, a pharmaceutical composition containing these compounds, an application of these compounds to the manufacture of a medicament for treating and / or preventing proliferative diseases, and using these compounds. The present invention relates to a method for treating and / or preventing proliferative diseases. |