Indole derivatives and pharmaceutical use thereof
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United States of America Patent
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Dec 20, 1994
Grant Date -
N/A
app pub date -
Apr 15, 1993
filing date -
Apr 16, 1992
priority date (Note) -
Expired
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Abstract
The invention relates to compounds of formula (I). ##STR1## or a salt, or metabolically labile ester thereof wherein R represents a group selected from halogen, alkyl, alkoxy, amino, alkylamino, dialkylamino, hydroxy, trifluoromethyl, trifluoromethoxy, nitro, cyano, SO.sub.2 R.sub.1 or COR.sub.1 wherein R.sub.1 represents hydroxy, methoxy, or amino; m is zero or an integer 1 or 2; A represents an ethynyl group or an optionally substituted ethenyl, or cyclopropyl group or a substituted ethenyl group; X represents --O-- or NH; R.sub.2 represents an aryl group and when X represents an oxygen atom R.sub.2 may also represent a hydrogen atom or an alkyl group; which are antagonists of excitatory amino acids, to processes for their preparation and to their use in medicine.
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