https://www.selleckchem.com/pr....oducts/protoporphyri
A side-by-side pharmacological comparison of ribose and (N)-methanocarba (bicyclo[3.1.0]hexane) nucleosides as A3AR agonists indicated that the bicyclic pseudoribose ring constraint provided higher affinity/selectivity at human and mouse A3AR. The mean affinity enhancement for 5 pairs of 5'-methylamides was 11-fold at hA3AR and 42-fold at mA3AR. Novel C2-(5-fluorothien-2-ylethynyl) substitution enhanced affinity in the methanocarba but not ribose series, with highly hA3AR-selective 16 (MRS7334) displaying Ki 280 pM and favorab