Abstract
From the roots of Silene jenisseensis a new trans- p-methoxycinnamoyl triterpene saponin has been isolated along with its cis- p-methoxycinnamoyl isomer as an inseparable mixture. Their structures were 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-[β- d-glucopyranosyl -(1 → 2)-α- l- rhamnopyranosyl-(1 → 2)-β- d-4-O-trans-p- methoxycinnamoyl-fucopyranosyl ] quillaic acid and its cis-isomer, respectively. They did not show any activity in the in vitro chemoluminescence granulocytes assay, but exhibited only a weak inhibitory effect in the cyclooxygenase inhibition assay.
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