Perisesaccharides A–E, New Oligosaccharides from the Root Barks of Periploca sepium

Abstract

Five new oligosaccharides, named perisesaccharides A–E (1–5), were isolated from the root barks of Periploca sepium. Their structures were elucidated by NMR and HRESIMS data. The absolute configurations of these compounds were determined by a combination of X‐ray diffraction analysis, modified Mosher's method, circular dichroism spectroscopy, and acid hydrolysis. The boat conformation of oleandronic acid δ-lactone was reported for the first time.

Asclepiadaceae - Periploca sepium - oligosaccharid - perisesaccharides A–E - oleandronic acid δ‐lactone

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