OBJECTIVE: To study the chemical constituents of Tibetan medicine Caryopteris toroetii.METHOD: The crude drug was extracted with 95% EtOH and isolated by repeated chromatographic methods. The structures of the isolated compounds were elucidated on the basis of spectral analysis.
RESULT: Two en-kaurene diterpenoid compounds: oridonin (1) and nodosin (2), were obtained from C. toroetii and their 1H and 13C-NMR data in CD3OD were reported for the first time.
CONCLUSION: The en-kaurene diterpenoid compounds were obtained from genus Caryopteris for the first time.
Two new iridoid glycosides designated as senburiside III (2) and senburiside IV (3), together with one known iridoid glycoside senburiside I (1) and three known secoiridoid glucosides swertiamarin (4), gentiopicroside (5) and sweroside (6), were isolated from the whole plant of Swertia franchetiana. The structures of the two new compounds were elucidated by spectroscopic methods.;
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