| 摘要 |
<p>The invention concerns compounds of formula (I), in which R is (i), (ii) or (iii); n is 0, 1 or 2; X means O or S; and R?1, R2, R3 and R4¿ have different meanings, or a cyclized tautomeric shape. The invention also concerns the (E) isomers and salts of these compounds which display endothelin receptor antagonistic properties.</p> |
