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Showing papers by "Tom J. Mabry published in 1974"


Journal ArticleDOI
TL;DR: The sesquiterpene lactone, glaucolide-A, was found to reduce larval feeding when incorporated in a Vernonia powder-agar medium, and the amount of insect feeding was inversely proportional to the concentration of glau COLIDE-A in the medium.

85 citations


Journal ArticleDOI
TL;DR: The structures of two new germacranolides, glaucolide-A ( 1a ) and -B ( 1b ), isolated from more than 25 species of Vernonia from the Western Hemisphere, have been established by a series of chemical transformations, and spectral and X-ray crystallographic studies as discussed by the authors.

56 citations


Journal ArticleDOI
TL;DR: The wax on the stems and leaves of Larrea divaricata contains a mixture of even carbon-numbered alkyl esters (C48-C56) consisting of fatty acids (C22-C32) and primary alcohols (C24-C30) as discussed by the authors.

22 citations


Journal ArticleDOI
TL;DR: The hypothesis that betalamic acid is formed in vivo by an oxidative cleavage of l -dopa and that it is an intermediate in the biogenesis of other betalains from dopa is supported.

20 citations



Journal ArticleDOI
TL;DR: In addition to the usual protein amino acids, most of the species examined contained high concentrations of the non-protein amino acids such as pipecolic acid, 4-hydroxypipecolic acids and proline as mentioned in this paper.

16 citations


Journal ArticleDOI
TL;DR: A new germacranolide, marginatin, has been isolated from three species of Vernonia from the central United States, including V. marginata, V. fasciculata and V. arkansana, and its structure has been determined.

14 citations




Journal ArticleDOI
TL;DR: The structure of a new diterpene triol isolated from a collection of Gymnosperma glutinosa (Compositae) from Mexico, has been determined to be (−)-7β,8α,15-trihydroxy-labdan.

7 citations