| abstract |
The present invention refers to compounds of the general formula (I) wherein R1 is hydrogen or hydroxy; R2 is butyl or butyryl if R1 is hydroxy, but R2 is butyl if R1 is hydrogen; or R1 and R2 taken together are 1-propylidene or 1-butylidene optionally substituted by hydroxy, methyl, or 3-(α,β-dimethylacryloyloxy); the dotted line is an optional bond; X is an optionally substituted aliphatic C4- residue selected from the group consisting of X1, X2, X3, X4, and X5; wherein X is X2, X3 or X5 if the dotted line in formula (I) is absent; and X is Xl, X4 or X5 if the dotted line signifies a bond in formula (I) above; R3 and R4 are, independently from each other, hydrogen or hydroxy; and R5 is hydroxy or butyryl, for use in the treatment of disorders connected to impaired neurotransmission, as well as to dietary and pharmaceutical compositions containing such compounds, and their uses. |