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[The structure and antihypoxic action of alpha-dicarbonyl compounds and their derivatives].

The protective action in hypoxic hypoxia of 29 synthetized alpha-dicarbonyl compounds were studied. In this series of substances the natihypoxic activity was found to be most marked in drugs whose redox potential amounted to 0.15--0.3 V and which displayed a high dehydrating activity. Such compounds include isatin, its 3-anyl, 3-thiosemicarbation of ethyl either, isatin-1 of acetic acid and acenaphthequinone. Substitution is position 1 and 3 of isatin can lead to the formation of active substances, whereas substitution in position 2 usually reduces the antihypoxic activity.