Objective: To study the chemical constituents of Periploca calophylla.
Method: Various chromatographic techniques were used to isolate the constituents, and their structures were identified by spectral and chemical methods.
Result: Two oligosaccharides were isolated from the chloroform part of P. calophylla and their structures were identified as 4-O-acetyl-beta-cymaropyranosyl (1-->4)-O-beta-D-cymaropyranosyl(1-->4)-O-beta-D-canaropyranosyl (1-->4)-O-beta-D-cymaropyranosy(1-->4)-O-oleandronic acid-delta-lactone(1), and perisaccharide B (2).
Conclusion: Compound 1 is a new compound. Compound 2 is reported for the first time from this plant.
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