Optically-active derivatives of (R) 5-pentylamino-5-oxopentanoic

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Radical -xh acid – or anhydride – acid halide or salt thereof...

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562448, A61K 31195

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active

056021798

ABSTRACT:
There are described optically active derivatives of (R) 5-pentylamino-5-oxopentanoic acid and their pharmaceutically acceptable salts, having antagonistic activity towards cholecystokinin, and with the formula: ##STR1## in which R.sub.1 is selected from the groups 2-naphthyl, 3,4-dichlorophenyl and 3,4-dimethylphenyl and R.sub.2 is a pentyl group or an alkoxyalkyl group with 4 carbon atoms, and in which the substituents on the central chiral group (marked with an asterisk in Formula (I)), have the R (rectus) conformation.

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