Well here's the thing, there has been some talk regarding n-oxides and zinc reduction helping yieds but very little actual tests AFAIK. I mean, maybe the amount of n-oxide in plants is negligible to begin with. Or maybe only if stored in really unpropper conditions would any significant amount form? Who knows...
I wrote a little about n-oxides here:
https://www.dmt-nexus.me...&m=281444#post281444A test that would really help would be, extracting side by side some old mimosa, half doing the zinc reduction on the acidic step, half not doing it, then extracting it and comparing yields. Often people dont take care and many variables are different so its hard to really compare.
Just make an acetic acid solution that contains your alkaloids, add excess zinc dust, mix for half an hour to a couple of hours, filter, add base, extract with solvent, and there you go

5-MeO-DMT-N-oxide does exist, but AFAIK its only been found in traces in plants. Maybe plants you would extract from wouldnt have it in the first place. You could always do a side-by-side and test, if you do get some 5-Meo plant source
So far there are many plants found with traces of 5-MeO-DMT, but I dont think its gonna be easy for you to find some plant with good 5-MeO profile and plenty availability like mimosa has DMT. A few plants have been found with significant amout of 5-MeO-DMT:
Anadenanthera peregrina bark has been found with 0.025%, up to 0.4% 5-MeO-DMT. Together with 5-MeO-DMT there were other substances such as NMT (
active) and 5-MeO-NMT (potentially active, but unknown), and to separate them one would need some sort of chromatography work.
Desmodium pulchellum, stem and leaf of mature plant, has been found with 1.1% alkaloids, 34% of which were 5-MeO-DMT (I will try to dig up the source to see what where the other alkaloids)
Virola theiodora snuffs (made of the dried, powdered resin of the plant, which is often traditionally mixed with some base such as calcium oxide/hydroxide) has been found with 0.5 to up to 10% 5-MeO-DMT (!!!). Analysis of the bark only reported from 0.062 to 0.1% 5-MeO-DMT, but the natives dont use whole bark for snuff, just the resin. That might be one of the best bets in terms of plant source for 5-MeO but to find someone selling it might not be easy. Also remember that vendors might not really know well about plant identification, so thats another factor to take in account.
In some places in south america it would be easier to find of course, maybe finding a local vendor that ships it to you would be a potential way (learn how to speak spanish/portuguese, search the internet, call places/send emails).
Im currently on the search of one brazilian local variety of anadenanthera peregrina which should have good 5-MeO-DMT content in the seeds but still nothing. One I do get it Ill get it analysed and will share the results.
Good luck and let us know how it goes for you
