Gamma-aminobutyric acid derivatives, process for production thereof, and use thereof as medicaments

摘要

A compound which is 4-(3,5-dihydroxy-3-methylpentylamide)butyric acid or its pharmaceutically acceptable salt or ester; this compound being produced by reacting a salt or an ester of gamma-aminobutyric acid with beta-hydroxy-beta-methyl-delta-valerolactone, and as required, converting the resulting compound in the form of a salt or ester to a free acid, or as required, converting the resulting compound in the form of a free acid to its pharmaceutically acceptable salt or ester; and useful as a medicament for preventing or treating an impediment in cerebral function.