From Artemisia tridentata

Pyranoid monoterpenoid alkaloids have been reviewed, " and halogenated members of this class, (84) and (85), have already been discussed in the halogenated monoterpenoids section. " " The monoterpenoid ether (245) is reported from Artemisia tridentata-, from reported mass spectral data it may well be identical with the previously reported (and uncited) arthole (Vol. 7, p. 20), the characterization of which is still not published. Loliolide (246) is claimed to be an in vivo carotenoid degradation product in Canscora decussata additional spectral data have been published. ... 

Artemisyl, Santoiinyl, Lavandulyl, and Chrysanthemyl Derivatives.—Oxidosan-tolina triene (74) has been isolated from Artemisia tridentata together with (75), the diastereoisomer of a previously reported ester (Vol. 6, p. 20 see Vol. 7, p. 21... 

The occurrence and syntheses of rose oxides, dihydrorose oxides, rosefuran, and nerol oxides, together with related compounds, have been reviewed. The structure of a cyclic monoterpenoid ether from Artemisia tridentata, which is related to the santolinyl monoterpenoids, has been confirmed (c/. Vol, 7, p. 20) as (227) and renamed artemiseole (c/. Vol. 8, p. 58 for an incorrect structural deduction).Interestingly, another new component of A. tridentata, the (3S)-diastereoisomer of (74), with formic acid yields (227) in contrast to (74) which yields the acyclic aldehyde (228). ° It is possible that some of the 31% of unidentified components in the essential oil of A. annua may correspond to these new compounds.The quinone (229) has been isolated from Lithospermum erythrofhizon, and further details on the presence of aeginetolide in Aeginetia indica have been published. 

TERRESTRIAL Plants Big sagebrush, Artemisia tridentata, whole, Idaho Distance from phosphate plant ... 

The recent discovery in Artemisia tridentata rothrockii of rothrockene (84) , a monoterpene that could be derived from the C,o equivalent (85) of the hypothetical tertiary cyclopropylcarbinyl intermediate (82) above, strengthens the suggestion of such carbocationic rearrangements in nature. 

Little is known of the biosynthetic routes to the irregular monoterpenoids. It has been suggested that chrysanthemyl alcohol is a parent of the class that includes artemisia ketone, lavandulol, and santolinatriene, and stereochemical considerations have indicated that the (1/ , 3i )-isomer (16) of this alcohol would be the required precursor. The alcohol (16) occurs in Artemisia ludoviciana, and this is the first identification of the alcohol from a natural source. The santolinyl compound (17) also occurs in Artemisia tridentata and the 5-stereochemistry at C-3 is as expected if (16) (presumably as its pyrophosphate ester) is a precursor. 

To evaluate the feasibility of the use of lichens as in situ biomonitors of atmospheric pollution in a semiarid climate, Rope and Pearson (1990) applied two techniques of evaluation in their study area in Idaho trace element analysis and electrolyte leakage from cells. The lichen Lecanora melanophthalma accumulated for the most part higher levels of elemental content than vascular plants such as Artemisia tridentata and either comparable or lower levels than soil. The above-mentioned lichen was the only species to show a significant difference in electrolyte leakage which could be associated with the distance from a chemical processing plant. 

Nagy JG, Tengerdy RP (1968) Antibacterial action of essential oils of Artemisia as an ecological factor. II. Antibacterial action of the volatile oils of Artemisia tridentata (Big sagebrush) on bacteria from the rumen of mule deer. Appl Microbiol 16 441 444 Nagy JG, Steinhoff HW, Ward GM (1964) Effects of essential oils of sagebrush on deer rumen microbial function. J Wildl Manage 28 785-790... 

Methyl jasmonate has been detected from leaves oi Artemisia absinthium and A. tridentata [102] as well as from the essential oil of rosemary and peppermint [103,104], Although it has been identified as an aroma component of semi-fermented teas [85], it is not clear if methyl jasmonate is present in fresh tea leaves or is produced during the fermentation process. 

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