Where were these isolated from? If from a natural source, look up the genus and see if related compounds have been found. As SciFinder works with Chemical Abstracts Services, you've already covered a lot of compounds.

hello, regarding your question about the purifications of fatty acids, and to know is what are new molecules, there are several methods:

either by check cpg / mass

or order standard and you can spend a HPLC

SciFinder should have covered most reported compounds. Additionally, try searching Dictionary of Organic compounds and Dictionary of Natural Products

These compounds were isolated from fungus..thanks for all the kind advice and suggestions. I will try to check again with Scifinder and Dictionary of Natural Products for further confirmation..

Hallo, in my opinion don't waste your time with these fatty acids as I am sure they will be known, some times you need to assign the configuration. moreover they are inactive, so you will not find an application. If you have an extract from fungi, please wash it with hexen to remove the fats and start to fractionate it with silica gel column chromatography or combi flash and concentrate on the interesting fraction to isolate new compounds with activities.