Look, either discuss these compounds with it us or don't... but don't go hit and run posting and ninja editing this away again. If you don't want to be associated with something, don't use your computer i.e. internet for it... if you'd just acquaint yourself a bit with the current situation of internet privacy you would know that everything is logged, far beyond crawlers alone. So make your choice please. It is really not fair to other Bluelighters either if you obscure your own threads and posts, that's not how we do things.
I don't know where you live and I'm not really asking, but in my personal opinion studying chemistry and being fascinated by psychedelic chemistry is no offense and you shouldn't be too concerned because it is not in itself incriminating. Having an illicit lab is of course and we don't want people talking about that kind of stuff here anyway. So if it is just for your personal interest, let's talk.
Not everything you say is entirely clear... "the ethyl" is cryptic, am I led to believe you mean EiPT itself (which is indeed 5-MeO-EiPT without the 5-methoxy)?
What does amphetamine have to do with anything? Let's either stick to the topic, or please explain yourself without using so-called run-on sentences. Amphetamine itself causes insomnia, yes. The levo-isomer may have a more physical component while the dextro-isomer is a bit more cleaned up and more selective in psychological action.
I have reason to believe that there are some syntheses to amphetamine that produce psychoactive impurities, which could cause extra excitation but in a bit more dirty way. I once bought amphetamine product myself once that was smelly, yellow-orange in color and produced such strong side-effects (but also relatively strong euphoria). I cleaned it up myself with ice-cold acetone, which removed the smell and color, and also a lot of those side-effects. Became much more functional. I do not know what the impurity is but I was told once upon a time, then forgot unfortunately.
Oh, you are wondering what gives 5-MeO-EiPT an upper feeling? That would be the fact that many 5-MeO tryptamines are monoamine reuptake inhibitors (methylphenidate / ritalin is one as well for example). You cannot attribute that quality to just one part of the molecule, the compound is just like that. Then again, the non-5-MeO counterparts of these tryptamines basically don't have such significant pharmacological monoamine reuptake inhibiting action so you could say that it is the 5-MeO group that lends it, though it is on the verge of oversimplification.
Monoamines are for example dopamine and norepinephrine. Reuptake inhibition is partial prevention of letting transporters recycle these monoamines back into the neuron from the synapse where they were previously released.