Substituted benzoylamino-indan-2-carboxylic acids and related compounds

A compound of the formula Ia

• wherein:
• A is CH═CH;
• R23 is hydrogen, halogen, (C1-C4)-alkyl, or (C1-C4)-alkyloxy;
• R24 is hydrogen or halogen;
• X is N(H)C═O;
• Y is C(R12)═C(R13);
• R12 is (C1-C6)-alkyl, (C3-C6)-alkenyl, (C4-C6)-cycloalkyloxy, (C5-C6)-cycloalkyl, (C5-C6)-cycloalkenyl, (C3)-cycloalkyl[(C2)-alkyl or (C2)-alkenyl], (C3)-cycloalkyl(C1)-alkyloxy, (C3-C4)-alkyloxy, (C3)-alkenyloxy, (C1-C3)-alkyl-S—, or (C3)-alkylcarbonyl;
• R13 is hydrogen, halogen, or (C1)-alkyl;
• R21 is hydrogen;
• R22 is hydrogen, halogen, or (C1)-alkyl;
• and
• R51 is COOH;
• wherein all alkyl groups herein can independently of each other be optionally substituted by one or more fluorine atoms;
• or
• a pharmaceutically acceptable ester thereof, a stereoisomeric form thereof, mixture of stereoisomeric forms thereof in any ratio, or a physiologically acceptable salt thereof.