Well, that's the thing with anologies comparing meth and mdma, certain analogies do hold true.
Methcathinone, the way I made it many, many moons ago with KMnO4;
A simple oxidation with potassium permanganate in a very dilute water solution.... (find 'cold cat' method) in a cold environment
apparently, crystallization affects whether one gets the racemic form, using different alcohols generates different racemic profiles.
What I had was a fine white crystalline powder. When snorted, it produced a notably intense stimulation, that upon first glance, was similar to the come-up on methamphetamine. However, it lasted only about 30 or 40 minutes and gave way to a lethargic feeling. Trying to get back to the previous point, I did more, and got back to that point, but it wasn't as intense, and then, each time, had to take more to get close to getting that buzz again, then, when that wore off, more stupor, followed by an unpleasant feeling in the head, like a non-alcohol hangover, with similarities to alcohol.
24 hours later as your body processes it, a smell emanates, reminiscent of motor oil and perspiration. This was observed on 3 separate people and occasions.