Provided herein are compounds of the FormulaI:and stereoisomers, tautomers and pharmaceutically acceptable salts thereof, wherein R1, R2, R9, X1and G are as defined herein, which are inhibitors of one or more TAM kinases and/or c-Met kinase, and are useful in the treatment and prevention of diseases which can be treated with a TAM kinase inhibitor and/or a c-Met kinase inhibitor.本文提供式I化合物:以及其立體異構體、互變異構體及醫藥學上可接受的鹽,其中R1、R2、R9、X1以及G如本文所定義;式I化合物以及其立體異構體、互變異構體以及醫藥學上可接受的鹽是一種或多種TAM激酶及/或c-Met激酶的抑制劑,並且適用於治療及預防能夠用TAM激酶抑制劑及/或c-Met激酶抑制劑治療的疾病。