Abstract
New derivatives with hydroxyl, amino, and keto groups; halides; and N atoms were synthesized based on available guaiane-type sesquiterpene lactones arglabin, artefin, ludartin, and estafiatin isolated from yarrow and wormwood. The structures of the molecules were established using IR, UV, PMR, and 13C NMR spectral data. The molecular structures of 2, 6, 12, and 14 were proved by x-ray crystal structure analyses.
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