Compound of formula I can inhibit CHK1 and/or CHK2 with what. The invention discloses use in vitro, the in situ and in vivo diagnosis, the method prevented or treat such illness or associated pathological condition in mammalian cell with pharmaceutically acceptable salt what of compound of formula I and its stereoisomer.式I化合物可用於抑制CHK1和/或CHK2。本發明公開了使用式I化合物及其立體異構體與藥學上可接受的鹽用於活體外、原位及活體內診斷、預防或治療哺乳動物細胞中的此種病症或相關聯的病理狀况的方法。