| abstract |
Optically active derivatives of (R) 5-pentylamino-5-oxopentanoic acid and their pharmaceutically acceptable salts, having antagonistic activity towards cholecystokinin, and with formula (I), in which R1 is selected from the groups 2-naphthyl, 3,4-dichlorobenzoyl and 3,4-dimethylbenzoyl and R2 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. |