Synthesis of condensed tannins. Part 16. Stereochemical differentiation of the first “angular” (2S, 3R)-profisetinidin tetraflavanoids from Rhus lancea (Karee) and the varying dynamic behaviour of their derivatives. - Young,D.A.; Kolodziej,H.; Ferreira,D.; Roux,D.G. (J Chem Soc [Perkin I], 1985)