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Showing papers by "Tom J. Mabry published in 1988"


Journal ArticleDOI
TL;DR: In this paper, two terpenoids were isolated from Ageratina saltillensis including eighteen new compounds, namely, 16-hydroxy-3,4β-epoxy-5β, 10β-cis-17α,20α-cleroda-13(14)-en-15,16-olide, 3α, 4β-methoxy-4β-,16-trihydroxy, 5β,10β-Cis- 17α, 20α-, 20α-cleroda-15-oic acid

29 citations


Journal ArticleDOI
TL;DR: In this paper, seven new and 14 known compounds were isolated from Gymnosperma glutinosum and six of them have unusual B-rings with 2-methoxyl groups.

21 citations


Journal ArticleDOI
TL;DR: Agrostophyllin, the first naturally occurring phenanthropyran derivative, was isolated from the orchid Agroophyllum khasiyanum as mentioned in this paper, and it was shown to be a phenotypic indicator of the presence of humans.

13 citations


Journal ArticleDOI
TL;DR: One known and four new germacranolide-type sesquiterpene lactones were obtained from the dichloromethane extract of Chromolaena opadoclinia as mentioned in this paper.

13 citations


Journal ArticleDOI
TL;DR: The chloroform extract of the leaves of Onopordon tauricum yielded 10 sesquiterpene lactones, including elamanolide and four new eudesmanolides.

13 citations


Journal ArticleDOI
TL;DR: Ageratina tomentella has been investigated for sesquiterpene lactones, including 11,13-dehydro-8β-tigloyloxy-eleman-12-oic acid as discussed by the authors.

12 citations



Journal ArticleDOI
TL;DR: In this paper, the aerial parts of Gutierrezia sphaerocephala were extracted using spectroscopic methods and two new flavonoids, 5,3,4,5,5′-tetrahydroxy-6,7-dimethoxyflavone and 5,7,4′-trihydroxy -6,3′-dimethyl-flavanone, were elucidated.

12 citations


Journal ArticleDOI
TL;DR: In this paper, the aerial parts of Gaillardia coahuilensis were used to isolate one secopseudoguaianolide, 12 pseudoguanolides and one acyclic sesquiterpene glucoside, named gaillardoside.

6 citations


Journal ArticleDOI
TL;DR: In this article, the isolation of one guaianolide and eleven pseudoguaianolides as well as two seco-pseudoguanolides including five sesquiterpene lactones from above-ground parts of Gaillardia pulchella are described.

6 citations


Journal ArticleDOI
TL;DR: In this article, Piptothrix areolare afforded, in addition to 7-acetoxytinifoline and cis-p -hydroxycinnamic acid, two known and two new sesquiterpene lactones sharing unusual C 10 diester side chains.


Journal ArticleDOI
TL;DR: The annual species, Brickellia diffusa, was investigated for its flavonoid content and five mono- and diglycosides of kaempferol, a quercetin digly coside and a 6-methoxyquercetagetin mono-glycoside were isolated.

Journal ArticleDOI
TL;DR: Brickellia coulteri yielded only non 6-methoxy flavonoids, while B. microphylla contained an array of quercetagetin 6-methyl ether derivatives.

Journal ArticleDOI
TL;DR: Dark-grown cultures were found to synthesize small amounts of non-toxic, polycyclic diterpenoids when grown on modified MS-medium, while β-sitosterol and palmitic acid were found in dark- and light- grown cultures.
Abstract: Callus cultures derived from leaves, stem, sepals and ray flowers and cell suspension cultures of Helianthus maximiliani Schrader were established and analysed for their phytochemicals. Dark-grown cultures were found to synthesize small amounts of non-toxic, polycyclic diterpenoids when grown on modified MS-medium, while β-sitosterol and palmitic acid were found in dark- and light-grown cultures. Red light irradiation did not enhance terpenoid production compared to dark- and light-grown cells.