I believe that would be 5-MeO-AMT. That sounds utterly vile.
AMT is, or can be a gem of a compound. Its essentially the tryptamine analog of amphetamine. And it is, in action in vivo with a human as the subject, a serotonin releaser (I'd guess, never looked it up or if I did I cannot remember, but thats unsurprising, I am to rain man what a pigeon is to design, construction and subsequent operation and maintenance of a thorium-cycle breeder reactor whilst riding a unicycle, masturbating and reading 'war and peace' backwards, transliterating it from the original russian to arafuckingmaic. By way of chinese. AFTER being decapitated, plucked, slathered in a bit of butter dressing b efore being out into an oven and having done to it what donald 'prize pillock' trump/fart/passage of gas through the anus derived from fermentative processes within the intestine/bronx cheer/guff desperately needs to have done to him for the good of all humanity and all politicians as well. God...its shocking isn't it, that a coarse, thuggish, greasy little dollop of foetid dog sewage could be voted in. Even if the alternative is hilary satan, shit, even the ambulant, by oozing, by extending amoeba-eque pus-pseudopods tide of Staph aureus& Streptococcus pyogenes-infested testicular pus dribbling from a necrotic knob sore on a paeophile infected with terminal politics.
Him, not even the strong entactogenic effects of AMT could make my (albeit [classic/aka 'severe' ewewewewwewwewew autism, the 'ew' being aimed at the term 'severe' its horrid] autistic wetware produce such as a fractional little shy, retiring, agoraphobic pathetic spineless squelch of an attomolar-sized squirt of oxyto(x/c)in for, if he were to be first forcibly made massively physically dependent on a huge dose of methadone, and fentanyl, tied by the wrists and first injected with a LOT of diprenorphine, slowly skinned alive, dusted with salt and calcium hypochlorite, before being dipped, millimeter by millimeter, feet first, into a large tank of concentrated caustic potash and left to shriek until either he had a fatal pulmonary haemorrhage from the effort of screaming or simply ended up liquifying high enough up until he got dipped far enough in that his abdomen corroded at a point where his organs could all drop out into the KOH
(NOT a happy bunny about that svinya winning. Thought of him with a thuggish meat-blob fist hovering over the nuclear button is a scary thought, and a nasty one too)
But, otherwise, AMT is both an excellent entactogen, of the MDxx type vein, 5-HT releaser, DA/NA releaser too, as well as a bona-fide 5HT2a agonist psychedelic. Not like how with MDMA one has strongly entactogenic effects with, especially at high doses, the beginnings of some trippyness. AMT is a full blown outright psychedelic that can knock your socks so jolly well far back off, that if a closet be open nearby, you've got one long ass trek through narnia to find them again. It is a powerful stimulant, and a long lasting drug in most of its respects, I'd say its (amphetamine like) stimulant effects are in my experience with using AMT, the longest, the psychedelic and entactogenic effects dropping off first, probably psychedelic effects first, then entactogenic, although its got a very long afterglow, and finally the stimulant effects.
Being the indolic analog of amphetamine, it IS amphetamine-like, there is bruxism, if not remedied, magnesium helps, and it goes lovely with a dash of an NMDA antagonist IMO, I LOVE it with methoxetamine or 4-methoxy-PCP. Very nice with some IV morphine now and then, and especially more opiates for the day or two after (I did say it was long. I've never yet had DOx, but its easily as long as I've read of DOM, DOB etc. lasting, and its a good idea to have a generous quantity available (whether or not one wishes to actually use any) of a nice strong sedative-hypnotic, a strongly hypnotic benzo, is a good choice, like nitrazepam. If it were me personally, PERSONALLY, and this is NOT advice, because it would be dangerous for most people, especially with opiates, and especially in someone who is not used to the drug and also on opiates longterm as am I, but the downer stack, opiates excluded that I choose if I may do so, is benzo-wise, nitrazepam first choice, if not, loprazolam (not lorazepam, I MEAN loprazolam) second choice, and chlormethiazole as its partner (its a barbiturate site agonist without the AMPA type glutamate receptor antagonist properties of barbs) and some MXE as dissociative, although I'd LOVE to try the combination using 3-hydroxy-PCP because the last, is a delightful dissociative. And some memantine dosed at the start due to its nice long duration of action to help nix the bruxism.
Its a full on psychedelic and can be rough going even strength wise, lower doses strongly stimulant still, pretty strong to moderate-strong entactogen and some medium psychedelia.
Best routes IMO are up the backside and up the schnozzle, best bypass the GI tract, I believe it a pretty strong 5HT3 agonist, this is the same target ondansetron is an antagonist at, the antiemetic, that is super super ripoff expensive for the NHS, wholesale pricing I mean, given usually as a surgical pre and post med to stop vomiting and aspiration whilst intubated, and mainly for cancer patients on the nastier chemo regimes. I get it on rx, although I have neither cancer nor am having surgery. And it is astonishingly powerfully effective. Its had me (when hospital gave it me IM once) from first vomiting my stomach contents out, liquid all out, acid etc. then vomiting, curled up in the foetal position in agony and unable to help myself refrain from screaming in pain, spewing bile, foam, billious foam and blood therein every 2-3 minutes or so, to sitting up and reading my hastily thrown together bag of scientific journal literature within the time it took for the IM dose to take effect.
And when I get GI issue flareups its even better than the only other of my large collection of prescription GI drugs to approach it in efficacy, cyclizine, and that when extracted, and plugged (I've yet to render my cyclizine HCl into an injectable prep), and even then ondansetron leaves cyclizine up the asshole sucking an ondansetron-shaped dust trail and the shockwave left behind in the wake of its sonic boom.
So presumably agonistic effects at the very much nausea-involved 5HT3 receptor are in a large part responsible for the gutbuster potential, especially in high doses for AMT. Best taken up the ass, it really is. Snorting works but stings and leaves you with a clogged nose later. Although a squirt or two of xylometazoline locally acting nasal decongestant (its a vasoconstrictor acting on adrenergic receptors.) reverses that pretty thoroughly, makes things a lot more comfy both after taking the AMT up the snout and later on now and then too.
Entactogen-wise, this is the drug, that in combination with low-dose (compared to the doses of AMT I was using) helped me address my at the time pretty severe PTSD. I won't go too far into why I ended up with it, for it could and would compromise my security)
I think, due to some of its effects when I've had it not exactly on its own, but whilst on opiates and the daily doses of chlormethiazole I take for seizure prophylaxis without at the time dropping extra of either, so am used to and not overly sedated by these. But I MUST have a portion of both to prevent withdrawal and seizures respectively.
I've had strong doses of AMT, despite being powerfully stimulant, also be strongly drowsy and delightfully mongy and sedate-ey, not hypnotic just munty stuff, drowsy and languid in the extreme, so I believe its probably quite a powerful 5HT releaser. Not looked at the numbers recently. A weak inhibitor of MAO-a and is one of those drugs that like tramadol (with which this stuff should NEVER be combined, could be dangerous, likewise DXM and wouldn't suggest people drop pethidine on it either.