STRUCTURES OF PLATYCODIN-D3, PLATYCONIC ACID-A, AND THEIR DERIVATIVES, SAPONINS ISOLATED FROM ROOT OF PLATYCODON GRANDIFLORUM A. DE CANDOLLE, DETERMINED BY CARBON-13 NMR SPECTROSCOPY

Abstract
Six new saponins (5–10) and three new prosapogenins (13, 14, and 16) have been isolated from the root of Platycodon grandiflorum A. DC. Their structures have been elucidated by 13C NMR spectroscopy.