Plant proanthocyanidins. Part 6. Chiroptical studies. Part 95. Circular dichroism of procyanidins

Abstract

Circular dichroism spectra of 26 procyanidins and their derivatives have been measured. All exhibit a strong positive or negative couplet at 200–220 nm and this has been correlated with the absolute stereochemistry at C-4 on the interflavan linkage.