There is no evidence n-oxide forms in mimosa or acacia confusa. My personal experience also seema to imply DMT natural salt form is very stable against oxidation and even after years of less-than-ideal atorage conditions show no signs of oxidation. Just extract as normal and you shpuld be fine
As for 5-meo-dmt natural sources, still nothing reliable has been found so far. Analysis show that Vrola t. reain does contain good amounts but its not easy to find it. Yopo rarely if ever contains significant 5meo content, its mostly bufotenine (which ime is annoying to extract, tastes aweful and isnt pleasant but maybe your experience is different). One close relative to yopo, Anadenanthera falcata, has been tested to contain great 5 meo content but sometimes its mostly bufo too, including one batch i tested.
Good luck and post back any results, good or bad
