Abstract
We previously reported the isolation and structure elucidation of a new trans- p-methoxycinnamoyl triterpene-saponin along with its cis- p-methoxycinnamoyl isomer as an inseparable mixture from the roots of Silene jenisseensis. In a continuing study on this plant, two additional new acylated triterpene-saponins were obtained as an inseparable mixture. Their structures have been established by chemical means and spectroscopic methods including 1D and 2D homonuclear and heteronuclear correlation NMR spectroscopy as 3- O-[β- d-galactopyranosyl-(1 → 2)-β- d-glucuronopyranosyl]-28- O-[{α- l-rhamnopyranosyl-(1 → 2)}- {4- O- trans- p-methoxycinnamoyl}-β- d-fucopyranosyl] quillaic acid and its cis-isomer, respectively. They showed a significant enhancement of the granulocyte phagocytosis in vitro. © 1997 Elsevier Science Ltd. All rights reserved
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