ANTIPROLIFERATIVE AGENTS FOR THE TREATMENT OF PAH

Description

The present invention relates to compounds of formula I, where A, R1, R2, R3 and R4 are as defined herein, and pharmaceutically acceptable salts thereof; to pharmaceutical compositions comprising such compounds and salts; to methods for using such compounds, salts and compositions to treat pulmonary hypertension and related diseases, such as pulmonary arterial hypertension; to methods of using such compounds, salts and compositions to treat abnormal growth, such as cancer; and to processes for preparing such compounds, salts and compositions.