FIELD: chemistry.
SUBSTANCE: new compound of benzene polycarboxylic acids is proposed, which is obtained by oxidizing hydrolyzed lignin in an alkaline medium. The water-soluble polymer compound of benzene polycarboxylic acids is characterized in the fact that it has the following elemental composition: 62-67% C, 3.8-4.2% H, 29-34% O, and less than 0.2% N by weight in the dry state. The total content of the other elements is not more than 1% by weight in the dry state. The present invention also discloses the use of a new benzene polycarboxylic acid compound in a composition of a complex substance which is prepared by forming a complex of new benzene polycarboxylic acid compounds with a metal cation or encapsulating them in a metal cation. A method for preparing a new benzene polycarboxylic acid compound and its use in pharmaceutical compositions are also proposed.
EFFECT: improved effectiveness of the compound.
27 cl, 7 ex, 6 tbl, 13 dwg
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