Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... The aryloxymethylene group was used as a replacement for an ester or amide bond present in a series of ET A selective endothelin antagonists. The effect of such replacement on the binding affinity is described. ... The aryloxymethylene group was used as a replacement for an ...