Oh yeah - those are FAR more costly to produce.
But as I said, if someone can ONLY go through the 2,5-dimethoxy-4-<something> series both with the 2 carbon and 3 carbon tryptamines, that's still a LOT of compounds,
I've already pointed out that 7-methyl AMT overlays MMA, the latter mentioned in Pihkal as having been seized in Italy (?) where it was being sold AS MDMA.
Now I've never got on with the 5-MeO tryptamines but AET was also sold as MDMA (mentioned in Tihkal) and if you check out the Uphohn patents, you will notice that the addition of that 7 methyl increased it's monoamine release/reuptake by an order of magnitude, Now why 7-methyl AET but not 7-methyl AMT I do not know, but I found out, With the raecemate there is a window between inactive and psychedelic where is behaved as an entactogen, Sadly, cost at the time was too high at the scales we were considering,
I hasten to add that the cohort size was small so we really do not know when the stuff becomes toxic but along with a couple of other MDMA alternatives, it was just shelved. So what I'm saying is it worked... but I cannot assert it's at least as safe as MDMA.