Se. Hall et al., SYNTHESIS OF PYRROLIDINE OXAZOLES AS THROMBOXANE-A(2) ENDOPEROXIDE RECEPTOR ANTAGONISTS, Bioorganic & medicinal chemistry letters, 3(6), 1993, pp. 1263-1266
The synthesis and antiplatelet activity of a series of bis-heterocycli
c thromboxane A2 receptor antagonists is described. The L-proline anal
og 9 was the most potent ligand in this class with a K(D) = 7.9+/-0.71
nM in washed human platelets.