Artemisia ludoviciana

Artemisia ludoviciana var. mexicana Asterac. Aerial parts 266 q1... 

Ruiz-Cancino, A., Cano, A.E., and Delgado, G., Sesquiterpene lactones and flavonoids from Artemisia ludoviciana ssp. mexicana. Phytochemistry, 33, 1113, 1993. 

Artemisia ludoviciana Nutt (estafiate) Origanum vulgare (oregano)... 

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. 

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