The present invention relates to compounds of the formula (I) wherein X 1 and X 2 independently represent O, NH or S, R 1 and R 2 are independently selected from the group consisting of a C 1 -C 30 hydrocarbyl group, an amino acid bonded via an amide bond or a peptide bonded via an amide bond each having up to 200 amino acids, the conjugated residue X 1 or X 2 in this case being NH, and hydrogen, both radicals R 1 and R 2 preferably not being H, wherein R 3 is a residue selected from group consisting of —S—R 6 , wherein R 6 is a C 1 -C 30 hydrocarbyl group, at least one of R 1 and R 2 not being H when X 1 and X 2 are oxygen, —S—CH 2 —CH(NH 2 )(COOH) (cysteine-S-yl), a homologue or derivative (e.g. N-acetyl cysteine-S-yl) thereof, a peptide having up to 200 amino acids which contains at least one amino acid radical with a thiol group, preferably a cysteine radical, and is bonded via the thio sulfur, preferably via the cysteine sulfur (peptide-S-yl), coenzyme A which is bonded via a thiol group or fragments thereof, acyl carrier protein bonded via a thiol group, and dihydrolipoic acid bonded via a thiol group, and pharmaceutically acceptable salts thereof. The present invention also relates to the use of these compounds for preparing a drug and drugs containing the same.

The present invention relates to thiosuccinic acid derivatives and the use thereof for preparing a drug as well as drugs containing these derivatives.