| abstract |
Optically active derivatives of (R) 5-pentylamino-5-oxopentanoic acid and their pharmaceutically acceptable salts which have an antagonistic action on cholecystoquinine, of formula (I), in which R1 is chosen from the 2-naphthyl groups, 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 in the central chiral group (assigned an asterisk in formula (I)), have conformation R (rectus). |