HI Ram

I miscalculated in my previous email. The AI is actually about 1466. I used the wrong alkanes. 

Cheers, Nick

Yes, even a simple Google search says so. The spectroscopic and GC-MS data are provided here: http://www.publish.csiro.au/?act=view_file&file_id=CH9850325.pdf, http://link.springer.com/chapter/10.1007/978-1-4615-3290-3_9 and so on.

Dear Biswapriya,

Thanks for your reply, but I am not able to access full contents of these articles. Please provide full articles, if possible at your end.

regards,

RS Verma

Hi Ram, we have a shrub in Australia that yields an abundant quantity of that compound. Here is the paper with listed spectral properties. I have actually collected a specimen from the exact same location, but I have not yet hydrodistilled it. I will be soon. It may have the acetoxymyodesert-3-ene in the essential oil at a high concentration. We shall see. I already have some of the methoxymyodesert-3-ene from a specimen I collected from north of Mitchell, Qld. In these earlier papers the plant is called Myoperum deserti, but the name has changed to Eremophila deserti.

Dear Nicholas,

Thank you so much for sending research article on the topic. Recently, we detected two peaks having mass spectrum similar to 1-Acetoxymyodesert-3-ene in the essential oil of a wild aromatic plant. For confirmation, we need retention indices of the compounds. GC-MS analysis of authentic oil of Eremophila deserti (as you mentioned) could give useful information on retention data of these compounds.

With regards,

R S Verma

Well I may have some acetoxymyodesert-3-ene in my collection, but I cannot check until next week. If I have some I will calculate an arithmetic index for you. 

Thank you so much

Going through the above attached research article by N.J. Sadgrove, the following published article (cross ref.) can help in its identification by GC analysis.

1.   Hegarty, B. F., Kelly, J. R., Park, R. J., and Sutherland, M. D., Aust. J. Chem., 1970, 23, 107;

2.  Hamilton, W. D., Park, R. J., Perry, G. J., and Sutherland, M. D., Aust. J. Chem., 1973, 26, 375;

3.  Russell, C. A., and Sutherland, M. D., Aust. J. Chem., 1982, 35, 1881.

Hi Ram, I have examined a variety of specimens from Eremophila deserti and have discovered a number of chemotypes. In the latest analysis I have some unidentified components that you might want to compare to your sample with acetoxymyodesert-3-ene. I have attached GC-MS data. I will fractionate and check on NMR next week.

Thanks Nicholas

Hi Nicholas, I have seen GCMS data of Eremophila deserti  sent by you. The mass spectra of our compounds are different. for your information, I am attaching herewith RI (DB-5 column) and MS data of our sample.

Hi. So far all of my samples collected of Eremophila deserti (Myoporum deserti) have no acetoxymyodesert-3-ene. But if I come across some in the future, I will let you know.

Thanks Nicholas.

Hello Ram. Today I found a sample of mine has 1-acetoxymyodesert-3-ene. I don't know if you are still trying to verify your sample. I had two peaks representative of two isomers. The AI of the first was 1380 and the latter was 1391. I don't know if this is of any help to you. 

Nick

Thanks Nicholas for your continuous efforts and support.

The peaks of our sample are still unidentified. The RI values of our peaks/compounds are 1540 and 1563 on DB-5 column (5% Phenyl 95% dimethylpolysiloxane). If calculated RI/AI data of your sample are also from the same or equivalent column, then peaks of our sample are definitely representing to some other compounds.

Thanks and regard,

RS Verma  

Hi Ram

Today I matched the two compounds using C13 NMR. The first eluting compound is the R diastereomer  of 1-acetoxymyodesert-3-ene and the next is the S. We use a HP-5MS, which is the same as your column. Therefore, I think you have a different compound to ours. Do you have access to an NMR facility? 

Hi Nicholas

Yes, I have access to NMR facility. Now we are trying to isolate these compounds.

HI Ram

I miscalculated in my previous email. The AI is actually about 1466. I used the wrong alkanes. 

Cheers, Nick

Thanks Nicholas