Abstract: The present invention belongs to the field of plant extracts with activity on the central nervous system. Specifically, the plant extract of the present invention is an extract obtained from Hypericum polyanthemum and comprising the compound uliginosin B and/or compounds from the class of benzopyrans such as. The present invention also relates to a pharmaceutical composition comprising such an extract which has pharmacological action in psychiatric disorders, such as mood disorders, specifically, anti-depressant activity. Such as HP1 (6-isobutyryl-5,7-dimethoxy-2,2-dimethyl-benzopyran), HP2 (7-hydroxy-6-isobutyryl-5-methoxy-2,2-dimethyl-benzopyran) and HP3 (5-hydroxy-6-isobutyryl-7-methoxy-2,2-dimethyl-benzopyran)).

Abstract: The present invention relates to the use of paraxanthine for the manufacture of a non-anxiogenic psychoanaleptic drug for the treatment of a neuropsychiatric disorder.

Abstract: The invention relates to substituted arylamines and heteroarylamines, their preparation process and the pharmaceutical composition containing them. Said substituted amine is in accordance with the formula: ##STR1## in which R.sup.1 and R.sup.2 are optionally substituted alkyl radicals or form with N an optionally substituted piperazine or piperidine cycle, R.sup.3 and R.sup.4 represent a hydrogen atom or an organic radical, Y represents CR.sup.6 or N and R.sup.5 is an optionally substituted benzothiophenyl, benzofuranyl or naphthyl radical.These amines can be used in pharmaceutical compositions for the treatment of nervous depression or for stimulating vigilance.