• Archives of Pharmacal Research
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• v.24 no.6
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• pp.532-535
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• 2001

A new guaiane type sesquiterpene was isolated from the fruit of Torilis japonica (Umbelliferae). Based on NMR, IR and mass spectroscopy its structure was confirmed as deangeloyloxy torilin, $1{\beta},{\;}7{\alpha},{\;}10{\alpha}$H-11-acetoxy-guaia-4-en-3-one (1). This is the first report showing that this compound can be isolated from Torilis japonica.

• Journal of Ginseng Research
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• v.21 no.3
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• pp.214-218
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• 1997

New simple methods for the Isolation of sesquiterpenes from Panax ginseng were developed. First, volatile compounds were isolated by simultaneous distillation and extraction (SDE) with 30% methanol and $\alpha$-hexane instead of water and ethyl ether/pentane (1:1). Secondly, head space volatiles in U-shaped tube at 7$0^{\circ}C$ were passed through C18 Sep-Pak by nitrogen gas streaming and the adsorbed volatiles were fluted by $\alpha$-hexane. TLC analysis showed that the volatile concentrates consisted mainly of terpenes when colored by vanillin-sulfuric and. GC/MS data revealed that approximately 30 sesquiterpenes of molecular weight 204 occupied 81.1% or more of the volatile concentrates isolated by those two newly developed methods. Among these, alloaromadendrene, germacrene B, isocaryophyllene, $\alpha$-neoclovene, ${\gamma}$-muurolene, $\beta$-panaslnsene, and $\alpha$-humulene were identified as being major sesqulterpenes by authentic samples or literatme search Key words : Panax ginseng, volatile compound, sesquiterpene, isolation, new method, GC/MS.

• Korean Journal of Pharmacognosy
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• v.30 no.1
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• pp.70-73
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• 1999

Nine sesquiterpene lactones, which were isolated from Hemisteptia lyrata Bunge. Chrysanthemum zawadskii Herbich var. latilobum Kitamura and Chrysanthemum boreale Makino were evaluated for the farnesyl-protein transferase (FPTase) inhibitor, conducted by the scintillation proximity assay (SPA). The angeloylcumambrin B and tigloylcumambrin B inhibited a recombinant rat FPTase with $IC_{50}$ value of $78\;{\mu}g/ml$ $(225\;{\mu}M)$ and $90\;{\mu}g/ml$ $(260 \;{\mu}M)$, respectively.

• Natural Product Sciences
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• v.11 no.2
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• pp.55-57
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• 2005

Three known sesquiterpene lactones were isolated from the n-BuOH traction of the roots of Ixeris sonchifolia. Their structures were identified as macrocliniside A (1), glucozaluzanin C (2), and ixerin H (3), by spectral analyses. Compounds 1 and 2 are guaiane-type, while compound 3 is a germacrane-type sesquiterpene lactone. Compounds 1-3 are first isolated from I. sonchifolia.

• YAKHAK HOEJI
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• v.45 no.2
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• pp.147-152
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• 2001

The phytochemical study of the aerial parts of Artemisia sylvatica (Asteraceae) led to the isolation of nine sesquiterpene lactones, l$\alpha$-hydroperoxy-rupicolin A acetate (1), rupicolin B acetate (2), rupicolin A acetate (3), l$\alpha$-hydroxy-4$\alpha$-hydroperoxy-bishopsolicepolide (4), 1$\alpha$-hydroperoxy-4$\beta$-hydroxy-8$\alpha$-acetoxy-guaia-2,9,11 (13)-triene-6$\alpha$,12-oxide (5), 1$\alpha$-hydroperoxy-4$\alpha$-hydroxybishopsolicepolide (6), l$\alpha$,4$\beta$-dihydroxy-8$\alpha$-acetoxy-guaia-2,9,11(13)-triene-6$\alpha$,12-olive (7), rupicolin A (8) and l$\alpha$,4$\alpha$-dihydroxy-bishopsolicepolide (9). Their structures were established by chemical and spectroscopic methods.

• Archives of Pharmacal Research
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• v.27 no.10
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• pp.1016-1019
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• 2004

The chromatographic separation of a methylene chloride extract of Artemisia rubripes led to the isolation of a new sesquiterpene lactone (3), together with four known compounds, a coumarin (2) and three terpenes (1, 4, and 5). Their structures were characterized to be $1{\beta},6{\alpha}$- dihydroxy-4(15)-eudesmene (1), scopoletin (2), $1{\alpha},4{\beta}-dihydroxy-8{\alpha}$-acetoxy-guaia-2,10(14), 11(13)-triene-6,12-olide (3), $1{\alpha},4{\beta}$ -dihydroxy-8${\alpha}$-acetoxy-guaia-2,9,11(13)-triene-6,12-olide (4), and $\beta$ -sitosterol-3-O-${\beta}$-D-glycoside (5) by spectroscopic means.

• Bulletin of the Korean Chemical Society
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• v.24 no.5
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• pp.541-542
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• 2003

• Korean Journal of Pharmacognosy
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• v.24 no.2
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• pp.107-110
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• 1993

From the ethanol extract of the leaves of Artemisia selengensis a new sesquiterpene endoperoxide, bisabolene-2,5-endoperoxide, has been isolated. The structure of the peroxide was established on the basis of spectroscopic evidence.

• Bulletin of the Korean Chemical Society
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• v.35 no.11
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• pp.3346-3348
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• 2014

• Journal of Korean Society of Forest Science
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• v.110 no.4
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• pp.543-553
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• 2021

This research focused on the investigation of isoprene and terpene emissions from 30 major urban tree species. We conducted sampling using a specific dynamic enclosure system between August and September 2020. Seedlings less than three years old were enclosed in a chamber consisting of a 400 L transparent Tedlar bag. The air-flows from the chamber's outlet were sampled using Tenax-filled sorbent tubes in the presence of standard conditions (temperature: 30℃, PAR: 1,000 μmol/m²/sec). A thermal desorption GC/MS system was used to analyze 38 BVOC compounds (isoprene, monoterpene, sesquiterpene, oxygenated monoterpene, and sesquiterpene). Isoprene emitters included Phyllostachys bambusoides, Quercus serrata, Daphniphyllum macropodum, and Buxus Koreana. Monoterpene emitters included Pinus rigida, Acer pictum subsp. mono, Larix kaempfer, Magnolia denudata, Metasequoia glyptostroboides, Pinus koraiensis, Pinus densiflora, and Abies holophylla. The monoterpene emission profiles were dominated by α-pinene, myrcene, limonene, β-pinen, and sabinene, while caryophyllene and farnesene were the prominent sesquiterpenes. Predominant oxygenated monoterpene compounds were also discovered as pulegone, borneol, menthol, eucalyptol, and nerol, while caryophyllene oxide were the prominent oxygenated sesquiterpenes. Sesquiterpenes and oxygenated sesquiterpenes had relatively lower contributions for all species.