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Abstract
Four new ionones and ionone glycosides (1–4) were isolated from the whole plant of Rehmannia piasezkii Maxim. Their planar structures as well as absolute configuration were confirmed via spectroscopic analysis, ECD calculation, and X-ray crystallography. Compounds 1–4 were tested for their cytotoxicity against five human tumor cell lines and ability to inhibit LPS-activated NO production in the BV2 cell line.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Additional information
Funding
This work was financially supported by CAMS Initiative for Innovative Medicine [2021-I2M-1-027-4], [2021-I2M-1-028-1] and the State Key Laboratory of Bioactive Substance and Function of Natural Medicines; Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College.