Abstract:Four sesquiterpene lactones, astrodaucanolide A-D (1-4) with unique structures, toghether with two known phenylpropanoid esters (5 and 6) were isolated from a flower extract of Astrodaucus orientalis. The structures were established by 1D and 2D NMR spectroscopy and high-resolution mass spectrometry (HRESIMS), and the absolute configuration of 1-4 was determined by electronic circular dichroism (ECD). Compounds 1-4 novel architecture represents a new class of sesquiterpenes with new skeleton. A putative bios… Show more
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