I believe Amanita Citrina is supposed to contain small amounts of DMT and 5-MEO-DMT. I found this information at a site where they had a list of all DMT containing plants, animals, fungi. But I wouldn't try making an ayahuasca analog of those mushrooms. Extraction might work, that is if you happen to have a lot of Amanita Citrina's.
I wouldn't bother though, considering how relatively easily obtainable a lot of ayahuasca herbs are.