Stigmastan-steroid, stigma-4-ene-3-on (1) has been isolated from the bark of Chisocheton lansiocarpus. The chemical structure of stigmastan-steroid was identified based on spectroscopic data and by comparison of spectral data obtained previously. The discovery of stigma-4-ene-3-on in C. lansiocarpus was shown in this study for the first time.
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