If you are doing anything more potent than caffeine I am surprised by your comments about the "adverse effects of amphetamine". In your position, I would stay away from dodgy research and quasi-legal chemicals in favour of the well researched, documented and commonly medically prescribed amphetamines. Dextroamphetamine, methylphenidate are commonly prescribed for ADHD and less commonly methamphetamine. Their pharmacological profiles are well documented.
If you can bring yourself to move away from social stigma.
Propylhexedrine is unregulated. You can extract it from Benzedrex inhalers or probably find the pure powder online. However, caveat emptor. It is quite a heavy weight stimulant and can have some nasty side effects. Personally, I would not recommend it but I do not like any stimulants except caffeine.
I would certainly AVOID this " 1,3-Dimethylamylamine", looks very dodgy and to have very few desirable effects at all (purely a vasoconstrictor?) and to have a totally unestablished pharmacological profile in humans