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1Minor Sesquiterpene Lactones of Helianthus Pumilus

W HERZ,N KUMAR

The isolation of four known and two new germacradienolides and one known heliangolide from Helianthus pumilus, in addition to the previously report

1981Phytochemistry（1981）引用：38

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2Damsinic Acid and Ambrosanolides from Vegetative Ambrosia-Hispida

W HERZ, D GAGE,N KUMAR

Ambrosia hispida in the vegetative state furnished large quantities of damsinic acid and smaller amounts of ambrosin and damsin. Also isolated were anhydrocoronopilin, hispidulin and the new compounds 3-hydroxyambrosin damsinate and ent-12-oxokaura-9(11),16-dien-19-oic acid.

1981PHYTOCHEMISTRY（1981）引用：25

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3Heliangolides from Helianthus-Maximiliani

W HERZ,N KUMAR

The isolation is reported of tifruticin, acetyltifruticin, deoxytifruticin, acetyldeoxytifruticin, an orizabin analog and three heliangolides from Helianthus maximiliani.

1981PHYTOCHEMISTRY（1981）引用：45

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4Sesquiterpene Lactones from Helianthus-Grosseserratus

W HERZ,N KUMAR

The isolation is reported of six new sesquiterpene lactones based on the eudesmanolide, trans, trans-germacradienolide and heliangolide skeletons from Helianthus grosseserratus Martens. The diterpenes grandifloric, 17-hydroxy-ent-isokaur-15-enic and ciliaric acids and the flavones hispidulin and pectolinarigenin were also found.

1981PHYTOCHEMISTRY（1981）引用：56

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5Antileukemic C-15-functionalized Ambrosanolides from Rudbeckia Mollis

W HERZ,N KUMAR,JF BLOUNT

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAntileukemic C-15-functionalized ambrosanolides from Rudbeckia mollisWerner Herz, Narendra Kumar, and John F. BlountCite this: J. Org. Chem. 1981, 46, 7, 1356–1361Publication Date (Print):March 1, 1981Publication History Published online1 May 2002Published inissue 1 March 1981https://pubs.acs.org/doi/10.1021/jo00320a026https://doi.org/10.1021/jo00320a026research-articleACS PublicationsRequest reuse permissionsArticle Views100Altmetric-Citations29LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts

1981JOURNAL OF ORGANIC CHEMISTRY（1981）引用：41

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6Sesquiterpene Lactones and Other Constituents of Eupatorium Lancifolium and E. Semiserratum

W HERZ,SV GOVINDAN,N KUMAR

The isolation of the cytotoxic and/or antileukaemic heliangolides eupacunolin, eupacunin, desacetyleupacunin, a new germacradienolide and a coumarin fr

1981Phytochemistry（1981）引用：41

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7Cyto-Toxic Sesquiterpene Lactones of Eremanthus-Incanus and Heterocoma-Albida - Crystal-Structure and Stereochemistry of Eregoyazin

W HERZ,N KUMAR,W VICHNEWSKI,JF BLOUNT

AbstractFür Eregoyazin wird die Struktur (I) sichergestellt.

1980JOURNAL OF ORGANIC CHEMISTRY（1980）引用：41

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8A Thiol-Containing Ester Side Chain in a Sesquiterpene Lactone from Eupatorium Mikanioides. Absolute Configuration of Deacetyleupaserrin and Its Congeners

W HERZ,N KUMAR,JF BLOUNT

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA thiol-containing ester side chain in a sesquiterpene lactone from Eupatorium mikanioides. Absolute configuration of deacetyleupaserrin and its congenersWerner Herz, Narendra Kumar, and John F. BlountCite this: J. Org. Chem. 1980, 45, 3, 489–493Publication Date (Print):February 1, 1980Publication History Published online1 May 2002Published inissue 1 February 1980https://pubs.acs.org/doi/10.1021/jo01291a023https://doi.org/10.1021/jo01291a023research-articleACS PublicationsRequest reuse permissionsArticle Views124Altmetric-Citations32LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts

1980JOURNAL OF ORGANIC CHEMISTRY（1980）引用：48

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9Sesquiterpene Lactones of Calea Zacatechichi and C. Urticifolia

W HERZ,N KUMAR

Calea zacatechichi yielded the sesquiterpene lactone zexbrevin and a new analog, several analogs of neurolenin B including calein A, two analogs of budlein A and the flavones acacetin and O-methylacacetin. Calea urticifolia contained additional analogs of neurolenin B as well as a series of epoxidation products. Structures were established by spectrometric techniques. The results are contrasted with previous findings.

1980Phytochemistry（1980）引用：61

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10Guaianolides from Liatris Squarrosa

W HERZ,N KUMAR

The isolation of three new guaianolides related to spicatin from Liatris squarrosa is reported.

1980Phytochemistry（1980）引用：21

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11Sesquiterpene Lactones of Baltimora Recta

W HERZ,N KUMAR

The major sesquiterpene lactone of B. recta was the alantolide encelin (1) previously isolated from Encelia furinosa (Helianthinae) [4]. ‘H and 13C NMR spectra of encelin are included in Tables 1 and 2; in accordance with our earlier revision [S] of the structure of farinosin (5), the original assignments for H-13 and H-14 of encelin [4] must be interchanged. The previously unreported CD curve of 1 (see Experimental) exhibited multiple Cotton effects due to the presence of a$-

1979Phytochemistry（1979）引用：19

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12A Lactone Analog of Germacrone

W VICHNEWSKI,W HERZ,N KUMAR

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA lactone analog of germacroneWalter Vichnewski, Werner Herz, and Narendra KumarCite this: J. Org. Chem. 1979, 44, 14, 2575–2578Publication Date (Print):July 1, 1979Publication History Published online1 May 2002Published inissue 1 July 1979https://pubs.acs.org/doi/10.1021/jo01328a055https://doi.org/10.1021/jo01328a055research-articleACS PublicationsRequest reuse permissionsArticle Views97Altmetric-Citations20LEARN 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 Get e-Alerts

1979JOURNAL OF ORGANIC CHEMISTRY（1979）引用：30

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13Sesquiterpene Lactones of Eupatorium-Serotinum

W HERZ,RD GROOTE,R MURARI,N KUMAR,JF BLOUNT

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSesquiterpene lactones of Eupatorium serotinumWerner Herz, Ronald De Groote, Ramaswami Murari, Narendra Kumar, and John F. BlountCite this: J. Org. Chem. 1979, 44, 15, 2784–2788Publication Date (Print):July 1, 1979Publication History Published online1 May 2002Published inissue 1 July 1979https://pubs.acs.org/doi/10.1021/jo01329a039https://doi.org/10.1021/jo01329a039research-articleACS PublicationsRequest reuse permissionsArticle Views147Altmetric-Citations33LEARN 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-AlertscloseSupporting Info (1)»Supporting Information Supporting Information Get e-Alerts

1979The Journal of Organic Chemistry（1979）引用：69

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