Abstract: The invention relates to new molecular complexes of general formula: ##STR1## in which R represents a straight- or branched-chain alkyl radical having from 1 to 4 carbon atoms and R.sub.1 represents one of the radicals: ##STR2## These molecular complexes are especially useful for the preparation of 2-alkyl-3-(4-hydroxybenzoyl)benzofurans.

Abstract: Mono-, di-, tri- and tetra-esters derived from an acid of the general formula:R--OHin which R represents an acyl radical of the general formula: ##STR1## in which n represents 0 or 1, m represents 0, 1, 2, 3 or 4, R.sub.1 and R.sub.2 each represent a straight- or branched-chain alkyl radical having from 1 to 5 carbon atoms, R.sub.3 represents hydrogen or a straight- or branched-chain alkyl radical having from 1 to 5 carbon atoms, the sum of the carbon atoms in R.sub.1 and R.sub.2 being from 4 to 10 when R.sub.3 represents hydrogen and the sum of the carbon atoms in R.sub.1, R.sub.2 and R.sub.3 being from 6 to 15 when R.sub.3 is different from hydrogen, or R.sub.1 and R.sub.2 when they are taken together represent a tetramethylene, pentamethylene or hexamethylene radical and R.sub.

Abstract: .omega.-Dialkylalkanoic acid derivatives of the formula: ##STR1## in which R.sub.1 and R.sub.2, which can be the same or different, each represent an alkyl radical having from 1 to 4 carbon atoms and n represents 0, 1, 2 or 3.They possess a competitive inhibitory activity with respect to .gamma.-aminobutyric .alpha.-ketoglutaric transaminase as well as antianoxic and anticonvulsant properties and they are useful for treating central neurological disorders, whether resulting or not from cerebral ischemia, and disorders relating to the field of neuropsychiatry.