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Abstract
Three new C19-diterpenoid alkaloids, umbrosumines A–C (1–3), and 11 known compounds (4–14) were isolated from the roots of Delphinium umbrosum. Their structures were elucidated on the basis of the spectroscopic data interpretation.
Acknowledgements
We are grateful to the National Natural Science Foundation of China (No. 30873147) for the financial support of this research.