FIELD: organic chemistry, chemical technology, pharmacy. SUBSTANCE: invention relates to compounds of the formula (I) 
in all stereoisomeric forms and their mixtures in any ratios where HB means maleic acid, to method of synthesis of compounds of the formula (I) that involves anionic exchange of compounds of the formula (II) 
with maleic acid and/or maleates. Invention relates to also the pharmaceutical composition showing inhibitory effect on platelet aggregation or suppressing effect with respect of thrombosis. Therefore, compounds of the general formula (I) can be used as medicinal agents for prophylaxis of diseases associated with cardiovascular injuries. EFFECT: improved method of synthesis, valuable medicinal properties of compounds. 10 cl, 5 ex
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