Inhibitors of ERK protein kinase and uses thereof

摘要

Described herein are compounds that are useful as protein kinase inhibitors of formula I: or a pharmaceutically acceptable salt thereof, wherein Ring A, Z¹, Z², U, Q, R¹, R², and L are as defined herein. These compounds, and pharmaceutically acceptable compositions thereof, are useful for treating or lessening the severity of a variety of disorders, including proliferative disorders such as cancer.