Abstract
Cynaropicrin is a guaianolide sesquiterpene lactone with a 5-7-5 tricyclic skeleton, four exo-olefins, and two hydroxyl groups. This natural product has various biological activities including anti-inflammatory properties and antitrypanosomal activity. It was also found to suppress photoaging of the skin by inhibiting the transcription activity of nuclear factor-kappa B (NF-κB). In this paper, nine chemical derivatives of cynaropicrin were prepared, and the structure activity relationship (SAR) study for NF-κB inhibition by measuring relative light units (RLU) was conducted.
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