FUSED PIPERIDINES AS IP RECEPTOR AGONISTS FOR THE TREATMENT OF PAH AND RELATED DISORDERS

摘要

The present invention provides substituted pyrido[2,3-b]pyrazines which activate the IP receptor. Activating the IP receptor signaling pathway is useful to treat many forms of PAH, pulmonary fibrosis and exert beneficial effects in fibrotic conditions of various organs in animal models and in patients. Pharmaceutical compositions comprising such substituted pyride[2,3-b]pyrazines are also encompassed.