Eremophila caerulea

Monoterpenes do not appear to accumulate to any great extent in Eremophila species and their occurrence has been described for only a few cases. Thus, geranyl acetate (4) was isolated from E. abietina (13), 1,8-cineole (5) from E. scoparia (14) and E. dalyana (15), (+)-verbenone (6) from E. dempsteri (17) and (+)-fenchone (7) from E. caerulea (14). This last monoterpene is responsible for the scent which characterises this species in its normal habitat. From E. cuneifolia, m- andp-camphorene (8, 9) can be isolated from the steam distillate of the leaf resin (14) and, presumably, arise from dimerisation of the monoterpene myrcene during the isolation. 

Remarkably few triterpenes have been isolated from Eremophila species. Oleanolic acid and ursolic acid were isolated from E. caerulea (134) and 3-ept-oleanolic acid from E. platycalyx (16). Two unusual triterpenes (218 and 219) have been isolated from the wood oil of Eremophila mitchelli. Their structures were determined from a combination of spectroscopic techniques, aided by an X-ray diffraction study of the tetrahydro-derivative (220) of the dione (218). The... 

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See also in sourсe #XX -- [ , , ]

See also in sourсe #XX -- [ , ]

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