From the aerial parts of Achillea setacea W. & K. (Asteraceae) the main sesquiterpenes were isolated. Their structures were determined by means of 2D-NMR and MS as 11,13-dehydrodeacetylmatricarin (1) (= 14-deoxylactucin), rupicolin A (2), and rupicolin B (3). These are the first compounds with an
Inhibition of the T cell receptor (TCR) pathway represents an effective strategy for the treatment of T cell-mediated inflammatory and autoimmune diseases. To identify natural compounds that could inhibit inflammatory T cell responses, we screened 13 sesquiterpene lactones, including achillin,
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