The first naturally occurring 4-aryl flavan-3-ol

Abstract (2R, 3R, 4S)-4-(2,4,6-trihydroxyphenyl)flavan-3,3′,4′,5,7-pentaol, the first natural 4-aryl flavan-3-ol, was isolated from Nelia meyeri Schwant., and its structure and stereochemistry determined by spectroscopic investigation and synthesis.