One thing to bear in mind is just because you can theoretically find something in the mushroom in the lab doesn't mean it can be detected by the brain, particularly when in the presence of a powerful psychedelic like psilocybin/psilocin.
A lot of people get carried away with this idea that "because theres like 1% of baeocystin in this type of mushroom it's like a different trip dude". That's horseshit.
You are just pulling this outta yer ass, playing role of snide, superior super-debunker. Well, "horseshit", "dude".
(1) You have no ref to comparative study of people doing shrooms with zero baeocystin VERSUS people doing shrooms with various levels of it, comparing the effects. Or do you... if so lets see it.
(2) The range of comparative quantities varies widely within and between sub species, with some having as much as 1/3 the weight of the psilocin (P. semilanceata %weight .98/.02/.36 psiolocybin/psilocin/baeocystin).
(3) There is also neobaeocystin.
(4) Its entirely possible when one is dealing with psychedelic alkaloids that one could have some sensitizing effect that modifies the spectrum of the primary alkaloids effects... changing the "color" of the experience, without having alot of effect on its own. We see these kind of non-intuitive magnifying cross-effect all the time when people deliberately combine recreational drugs... or like with MaO inhibitors... or like a comparatively tiny relative quantity of a catalyst substance can have a huge impact on a chemical reaction. Or perhaps the presence of the psilocin somehow magnifies the effects of a much smaller amount of baocystin, who the hell knows? This is especially true when dealing with effects of things on nervous system receptors and other elements.
5) By your thinking 4-aco-dmt which theoretically hydrolyzes entirely into psilocin should have EXACTLY the same effect as shrooms, but I and tens of thousands of reports will prove it most certainly does NOT... it is usually a markedly different dispersal of effects, notably far far lower in the often strong dysphoria and anxiety reactions that shrooms tend to produce. If baeocystin is not responsible for this difference, THEN WHAT IS, SHERLOCK? Dont even think of saying
"Thats another myth, 4-aco-dmt and shrooms have exactly the same effects, all you duffuses are all just imagining via placebo effect that they are different" because you will be laughed out of the room.