Abstract: Isoflavans of the formula I ##STR1## wherein the groups OR, R', R" and ring B are as defined in the specification, exhibit valuable pharmacological properties, especially for the treatment of vascular diseases. They are prepared by methods known per se.

Abstract: Pharmaceutical preparations containing (+)-cyanidan-3-ol derivatives of the formula I ##STR1## wherein R' and R" are hydrogen, an unsubstituted or substituted hydrocarbon radical, or heterocyclic radical, halogen, formyl, free or functionally modified carboxyl, free or etherified or esterified hydroxyl, free, etherified or oxidized mercapto, unsubstituted or substituted sulfamoyl, acyl or unsubstituted or substituted amino, where however R' and R" cannot both be hydrogen simultaneously, and R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 are each hydrogen or an unsubstituted or substituted hydrocarbon radical, and R.sub.2 and R.sub.3 together can also be an unsubstituted or substituted methylene group, and R.sub.1 also an acyl group or an amidated carboxyl group; and therapeutically applicable salts of these compounds, as well as new compounds of these preparations.These pharmaceutical preparations are particularly valuable for treating liver and venous diseases.

Abstract: Compound of the formula ##STR1## in which R and R' represent hydrogen or an optionally substituted hydrocarbon radical or acyl radical,R.sub.1 represents hydrogen or an optionally substituted hydrocarbon radical of aliphatic or aromatic character,R.sub.2 represents hydrogen or an optionally substituted hydrocarbon radical of higher aliphatic or aromatic character,it being possible forR.sub.1 and R.sub.2 together to represent also an optionally substituted alkylene radical or an optionally substituted biphenyl-2,2'-ylene radical,whereby however, when R, R.sub.1 and R.sub.2 are hydrogen, R' cannot be methyl and salts of such compounds that contain a salt-forming grouping, and pharmaceutical compositions containing these compounds.The pharmaceutical compositions containing these compounds are particularly valuable for treating liver and veneous diseases.