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It's ironic that you mention this. I recently found a gram that I had purchased from a research chemical company a couple years ago. I was originally really intrigued, but decided to wait for other people's results. It's still very untested and how it works still sounds somewhat "magical". I think they go into phase 2 trials in the coming months. I'll probably start my own soon after I get over these seasonal allergies.
I think purchasing has become hard as the company is, oddly enough, trying to protect their patent from research chemical companies. That, along with so few studies on the chemical, is probably why the hype has tempered a bit.
What's interesting about NSI 189, within a peat framework, is that it is part of a class of compounds called isonicotinamides. Wikipedia defines isonicotinamide as 'the amide form of isonicotinic acid. It is an isomer of nicotinamide, which has the amide group in the 4-position.'
Different properties than nicotinamide of course but still an interesting bit...
I ask because a lot about its alleged benefit and the feedback found on the nootropics forums reminds me of tianeptine. However as you say it is new, so no study to guide us. There is already some feedback on forums and it is easy to buy, so I would expect more to come.