I wish to identify by GC-MS the structures with a low match value, such as communic acid, kaurenoic acid, daniellic acid, copalic acid, palustric acid, and labdanic structures so i need A.S., but at the best of my knowledge, no one of my accustomed seller handle a similar mix.
Have you tried sigma or aldrich, accustandard or Dr. Ehrenstorfer. Just google this and you can get their website
Thank you all, but I've already tried with Dr. Ehrenstorfer, Chiron and Sigma. I didn't know Accustandard, however, they don't sell these structures.
Chromadex will have your required standards. Hope u get all here.
Gud luck
Have you tried Nu-Check Prep? I think if they do not have it, they would sythesize it for you. And for your money of course :-) Otherwise, you may try with some local organic chemistry laboratories, don't you think?
Thank you Alok, neither Chromadex, but they will be useful for my work!
@ Igor and Andreas: thank you for your kind suggests, but we discuss of about ten compounds, so I though that will be most suitable to find a di/triterpene mix, or A.S. of them, because it will be very difficult to obtain them by chromatographic isolation (above all they have a very low epsilon, so they are not detectable by my Varian 940 LC). At my best knowledge, the only isolated compounds were abietic, giberellic and kaurenoic acids.
Good works for you all!
Fabrizio
you contact [email protected], They will supply asiaticoside, medecassoside and some other triterpenoides. naturalremedies R&D centre sells more than 150 phytocompounds
Sigma Aldrich product u may serch u can get tha satandard reference meterial
http://www.sigmaaldrich.com/india.html
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