FIELD: chemistry.
SUBSTANCE: invention relates to benzothiazole derivatives with general formula (I) and their pharmaceutically acceptable acid addition salts, optically pure enantiomers, racemates and diastereomer mixtures as adenosine receptor ligands and to a pharmaceutical preparation based on said compounds. In general formula 
(I), R1 represents C3-7cycloalkyl substituted with a OR group, or 2-(7-oxa-bicyclo[2.2.1]hept-1-yl)-ethyl; R represents hydrogen or C(O)-lower alkyl; X represents -CHR'-; and R' represents hydrogen or lower alkyl.
EFFECT: compounds can be used for treating or preventing diseases mediated by adenosine A2A receptors, for example Alzheimer's disease, certain depressive conditions, toxicomania and Parkinson's disease.
8 cl, 8 ex
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