Compounds of Formula (I) are provided herein. Such compounds, as well as pharmaceutically acceptable salts and compositions thereof, are useful for treating diseases or conditions, including conditions characterized by excessive cellular proliferation, such as breast cancer.本文提供式(I)化合物。此類化合物以及其醫藥上可接受之鹽及組成物可用於治療包括特徵在於過度細胞增生之病況的疾病或病況,諸如乳癌。