| 摘要 |
Compounds of the formula <IMAGE> (I) in which R1 and R2 independently of one another are substituted or unsubstituted aryl or hetero-aryl groups, R3 is hydrogen or lower alkyl and R4 is a substituted or unsubstituted aliphatic hydrocarbon radical, and their pharmaceutically usable salts. These compounds possess immunoregulatory, antithrombotic and antiinflammatory properties and can be used as active ingredients in medicaments. They are prepared, for example, by reacting compounds of the formulae <IMAGE> in which one of the radicals X and Y is mercapto, which can be in the form of a salt, and the other is a radical replaceable by etherified mercapto, with one another. |
