Longicornins A to D, four cis-1(10),cis-4-germacradienolides from Melampodium longicorne

Malcolm, Arcelio J.; Carpenter, Joel F.; Fronczek, Frank R.; Fischer, Nikolaus H.

doi:10.1016/s0031-9422(00)97691-x

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1987

1997

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Cited by 12 publications

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“…Further assignments of the basic skeleton of 9-desacetoxymelcanthin F were deduced from extensive double irradiation experiments and 13C-nmr data, the results being summarized in Tables 1 and 2. The great similarity of the nmr spectral data of lactone 1 with cis,cisgermacranolides from Melampodium species (5,6) suggested a similar skeleton for compound 1. A three-proton singlet at 3.79, typical of a carbomethoxy methyl, together with the downfield absorption of H-l at 6.81 indicated a m-l(10)-double bond (6).…”

Section: Resultsmentioning

confidence: 87%

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The Structure and Chemistry of Sesquiterpene Lactones from Polymnia maculata

Malcolm¹,

Fischer²

1987

J. Nat. Prod.

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Section: Resultsmentioning

confidence: 87%

“…The great similarity of the nmr spectral data of lactone 1 with cis,cisgermacranolides from Melampodium species (5,6) suggested a similar skeleton for compound 1. A three-proton singlet at 3.79, typical of a carbomethoxy methyl, together with the downfield absorption of H-l at 6.81 indicated a m-l(10)-double bond (6).…”

Section: Resultsmentioning

confidence: 87%