Abstract: The present invention belongs to the technical field of medicines, and relates to a class of fused ring compound, and the preparation and use thereof. Test results show that the compounds can significantly inhibit the ATM kinase activity, have a good selectivity for the ATM target, and have the pharmaceutical use of treating cancer.

Abstract: Disclosed is a compound as shown in formula (I) or a pharmaceutically acceptable salt, a stereoisomer, an isotope derivative or a prodrug thereof. The compound has an excellent activity as a cyclin-dependent kinase 9 (CDK9) inhibitor for treating hyperproliferative diseases. The experimental research on in vitro inhibition of cell proliferation and in vivo suppression of tumors shows that such compounds have a relatively strong inhibitory effect on MV4;11 cells and in vivo tumor models, and have a good selectivity and a low toxicity and few side effects, thereby possessing a good clinical value as novel anti-tumor drugs.