D. Chuck Dunbar

University of South Carolina

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Ilias Muhammad

University of Mississippi

Mark T. Hamann

Medical University of South Carolina

Khalid A. El Sayed

University of Louisiana at Monroe

Ikhlas A. Khan

University of Mississippi

Jianping Zhao

University of Mississippi

Larry Walker

University of Mississippi

Alice M. Clark

University of Queensland

Michelle Kelly

National Institute of Water and Atmospheric Research

Hala N. ElSohly

University of Mississippi

Volodymyr Samoylenko

University of Mississippi

Cooperative Institutions

University of Mississippi

King Saud University

National Institute of Water and Atmospheric Research

NTL Institute for Applied Behavioral Science

Louisiana State University

Pharmac

Chinese Academy of Sciences

University of Hawaiʻi at Mānoa

United States Department of Agriculture

University of Illinois Chicago

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neo-Clerodane diterpenoids from Teucrium oliverianum and structure revision of teucrolin E

Phytochemistry (2002)

Mohammed A. Al‐Yahya Farouk S. El‐Feraly D. Chuck Dunbar Ilias Muhammad

Heteronuclear molecule

Oxetane

Homonuclear molecule

Teucrium

Tetrahydrofuran

10.1016/s0031-9422(01)00396-x

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Citations (17)

Self-healing catalysts: Co₃O₄ nanorods for Fischer–Tropsch synthesis

Chemical Communications (2014)

Cun Wen D. Chuck Dunbar Xin Zhang Jochen Lauterbach Jason Hattrick‐Simpers

We combine kinetic and spectroscopic data to demonstrate the concept of a self-healing catalyst, which effectively eliminates the need for catalyst regeneration. The observed self-healing is triggered by controlling the crystallographic orientation at the catalyst surface.

Fischer–Tropsch process

Nanorod

10.1039/c4cc01021c

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Citations (19)

Two New Alkylated Piperidine Alkaloids from Western Honey Mesquite:Prosopis glandulosaTorr. var.torreyana

Natural Product Communications (2008)

Volodymyr Samoylenko D. Chuck Dunbar Melissa R. Jacob Vaishali Joshi Mohammad Ashfaq

Prosopis glandulosa Torr. var. torreyana (L. Benson) M. C. Johnston root bark, collected in Texas, yielded two new alkylated piperidine alkaloids, namely 3-isocassine (1) and N-methyl-3-isocassine (2), together with the previously reported N-methylcassine (3). In addition, the alkylated piperidinyl indolizidine alkaloid juliprosopine (4) was isolated from the leaves of the same plant. The structures and stereochemistry of compounds 1–4 were determined from 1D and 2D NMR data, including COSY, HMQC, HMBC and NOESY experiments, and ESI-HRMS. Juliprosopine (4) demonstrated antimicrobial activities against a panel of microorganisms, including potent antifungal activities against Aspergillus fumigatus.

Prosopis glandulosa

Piperidine

Indolizidine

Prosopis

10.1177/1934578x0800300108

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Citations (5)

Cassia quinquangulata(マメ科)からの新規ナフトピロン誘導体とクインクアングリンおよびその配糖体の構造の訂正 | 文献情報 | J-GLOBAL 科学技術総合リンクセンター

Journal of Natural Products (2001)

XC Li D. Chuck Dunbar Hala N. ElSohly M Jacob Alison Nimrod

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New Constituents from Noni (Morinda citrifolia) Fruit Juice

Journal of Agricultural and Food Chemistry (2006)

Volodymyr Samoylenko Jianping Zhao D. Chuck Dunbar Ikhlas A. Khan James W. Rushing

Morinda citrifolia L. (Rubiaceae), known as noni, has a long history of traditional use in the Hawaiian and Tahitian islands. More recently, an array of commercial noni fruit juice products are gaining popularity as dietary supplements, with claims of anticancer and immunostimulant activities. The biologically active principles of noni are not fully known. In continuation of work on the isolation of markers from dietary supplements, this paper reports the isolation of three new markers, namely, 1-O-(3'-methylbut-3'-enyl)-β-d-glucopyranose (1), 1-n-butyl-4-(5'-formyl-2'-furanyl)methyl succinate (2), and 4-epi-borreriagenin (3), together with the known iridoid glycosides asperulosidic acid (4) and deacetylasperulosidic acid (5) and a mixture of 1-n-butyl-4-methyl-2-hydroxysuccinate (6a) and 1-n-butyl-4-methyl-3-hydroxysuccinate (6b), as well as a mixture of α- and β-glucopyranose from noni fruit juice obtained from Puerto Rico. The structures of compounds were based on 1H and 13C NMR, mainly 2D NMR COSY, HMQC, HMBC, and NOESY experiments, and HRMS. Furthermore, samples from fresh-squeezed noni fruit juice from Japan revealed the presence of scopoletin (7), in addition to compounds 1−6, indicating no significant differences in the marker constituents of noni collected from Atlantic and Pacific regions. Keywords: Noni; Morinda citrifolia; Rubiaceae; fruit juice; glycoside; iridoid; succinyl esters

Morinda

scopoletin

10.1021/jf060672u

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Citations (79)

Microbial Transformation of Rubijervine.

ChemInform (2003)

Khalid A. El Sayed D. Chuck Dunbar

Abstract For Abstract see ChemInform Abstract in Full Text.

10.1002/chin.200317182

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Practical NMR Relaxation for Chemists By Vladimir I. Bakhmutov (Texas A&M University). John Wiley & Sons, Ltd., Chichester. 2005. xi + 202 pp. 6 × 9 in. $89.95. ISBN 0-532-42154-5.

Journal of Natural Products (2006)

D. Chuck Dunbar

ADVERTISEMENT RETURN TO ISSUEPREVBook ReviewNEXTPractical NMR Relaxation for Chemists By Vladimir I. Bakhmutov (Texas A&M University). John Wiley & Sons, Ltd., Chichester. 2005. xi + 202 pp. 6 × 9 in. $89.95. ISBN 0-532-42154-5.D. Chuck DunbarView Author Information University of Mississippi University, MississippiCite this: J. Nat. Prod. 2006, 69, 1, 170Publication Date (Web):January 7, 2006Publication History Published online7 January 2006Published inissue 1 January 2006https://pubs.acs.org/doi/10.1021/np058256bhttps://doi.org/10.1021/np058256bbook-reviewACS PublicationsCopyright © 2006 American Chemical Society and American Society of PharmacognosyRequest reuse permissionsArticle Views149Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InRedditEmail Other access optionsGet e-Alertsclose SUBJECTS:Nuclear magnetic resonance spectroscopy Get e-Alerts

10.1021/np058256b

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Indolopyridoquinazoline alkaloid from Leptothyrsa sprucei

Phytochemistry (2001)

Xing-Cong Li D. Chuck Dunbar Hala N. ElSohly Larry Walker Alice M. Clark

Imperatorin

10.1016/s0031-9422(01)00248-5

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Citations (20)

Journal of Chemical Ecology (1999)

Steven C. Pennings Valerie J. Paul D. Chuck Dunbar Mark T. Hamann Wilfred A. Lumbang

Secondary metabolite

Chemical defense

10.1023/a:1020832414766

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Citations (49)

Terpenoid Tetrahydroisoquinoline Alkaloids Emetine, Klugine, and Isocephaeline Inhibit the Activation of Hypoxia-Inducible Factor-1 in Breast Tumor Cells

Journal of Natural Products (2005)

Yu‐Dong Zhou Yong-Pil Kim Kaleem A. Mohammed Deborah K. Jones Ilias Muhammad

Klugine (1), isocephaeline (2), and emetine (4) inhibited hypoxia-inducible factor-1 (HIF-1) activation by hypoxia in T47D breast tumor cells (IC50 values 0.2, 1.1, and 0.11 μM, respectively). Compounds 1, 2, and 4 inhibited both hypoxia- and iron chelator-induced HIF-1 activation by blocking HIF-1α protein accumulation.

Hypoxia

Emetine

Tetrahydroisoquinoline

Hypoxia-Inducible Factors

Hypoxia-Inducible Factor 1

10.1021/np050029m

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Citations (66)