| 摘要 |
There is provided compounds of formula (I) wherein the dotted line, X1, X2, X3, A, Y1, Y2, Y3, Y4, Z1, Z2, R2 and R3 have meanings given in the description, and pharmaceutically-acceptable salts thereof, which compounds are useful as selective agonists of the AT2 receptor, and thus, in particula r, in the treatment of inter alia gastrointestinal conditions, such as dyspepsi a, IBS and MOF, and cardiovascular disorders.
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