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Note | Regular issue | Vol 60, No. 3, 2003, pp.623-629
Published online, 6th January, 2003
DOI: 10.3987/COM-02-9669
New Sesquiterpene Lactones from Hemisteptia lyrata Bunge

Tae Joung Ha, Ki Hun Park, Dae Sik Jang, Jong Rok Lee, Ki Min Park, and Min Suk Yang*

*Department of Agricultural Chemistry, Division of Applied Life Science, Gyeongsang National University, Chinju, 660-701, Korea


From the flowers of Hemisteptia lyrata, two new and two known guaianolides were isolated. The structures and relative configuration of the new compounds were established as 8α-O-2-hydroxymethyl-2-propenoyl-3β-hydroxy-13-methoxy-4(15),10(14)-guaiadien-12,6-olide (1) and 3β,8α-dihydroxy-13-methoxy-4(15),10(14)-guaiadien-12,6-olide (2), together with known compounds, isoamberboin (3) and 11,13-dihydro-deacylcynaropicrin (4). The structures were established by spectral data and X-Ray diffraction analysis.