220584-76-9Relevant articles and documents
Pyrrolidine-3-carboxylic acids as endothelin antagonists. 5. Highly selective, potent, and orally active ETA antagonists
Jae,Winn,Von Geldern,Sorensen,Chiou,Nguyen,Marsh,Opgenorth
, p. 3978 - 3984 (2007/10/03)
The synthesis and structure-activity relationships (SAR) of a series of pyrrolidine-3-carboxylic acids as endothelin antagonists are described. The data shows an increase in selectivity when the methoxy of Atrasentan (ABT-627) is replaced with methyl, and the benzodioxole is replaced with dihydrobenzofuran. Adding a fluorine further increases the binding activity and provides a metabolically stable and orally bioavailable ETA-selective antagonist.