Wow we've made it far guys!
Go SotF wohooo!!
Now, on topic.
This thought I had isn't really supported by any documents nor have I found it anywhere on google and pubchem but judging by some similar existing compounds, I can't see why they couldn't be worth a go.
So we have IAP which isn't neurotoxic (and that's a big plus IMO) but lacks of dopamine realeasing potentials according to F&B, then we have
Xylopropamine that seems to be more effective as a stimulant but I have no idea about it's neurotoxicity. Very little information on the net about this compound even if it was sold as an appetite suppressant.
Shulgin wrote down a few paragraphs regarding xylopropamine and othe methylated amphetamines:
2,5-Dimethylamphetamine has been looked at, in man, as a potential anorexic, but there is little effect even at 150 milligrams. The 3,4-isomer, 3,4-dimethylamphetamine or xylopropamine, is an adrenergic agent and it has been found to be an analgesic in man at as little as 10 milligrams. This was assayed, rather remarkably, by attaching electrodes to the tooth fillings of the experimental subjects. But with this base, cardiovascular effects were not observed until doses of about 100 milligrams were administered, and toxic effects (nausea and vomiting) were reported at 150 milligrams. There was no suggestion of anything psychedelic.
All three isomers of monomethylamphetamine have also been looked at in man. The ortho- and meta-isomers, 2-methyl- (and 3-methyl-) amphetamine are weak anorexics. At doses of up to 150 milligrams orally, there were signs of stimulation noted—talkativeness and loss of appetite. The para-isomer, 4-methylamphetamine or Aptrol, is more potent. At 75 milligrams (orally, in man) there is clear adrenergic stimulation, and at twice this dosage there are signs of mild toxicity such as salivation, coughing and vomiting.
So my suggestions are:
1) aminopropyl benzocyclobutene
2) aminopropyl benzocyclopropene
(note, the alkene suffix comes from the benzene double bond)
Both much less bulkier than IAP and xylopropamine, my interests goes moslty on the 2nd one since by shape, it's the most similar to amphetamine but the tight carbon bond prevents it from turning into dihydroxyamphetamine (the phenyl becomes a bit distorted in 3d though).