Callistephus A, a novel sesquiterpene from the Callistephus chinensis flower

- Two new compounds were discovered from the Callistephus chinensis flower.
- Their structures were identified by the interpretation of spectroscopic data.
- X-ray and ECD calculation were applied to determine the absolute configuration.
- Callistephus A represents a rare sesquiterpene and its possible biogenesis was proposed.