Both are classed as either toxic and/or corrosive substances. While the methylenedioxy moiety is present on piperine, this compound does not induce properties similar to MDMA. In short, it's a completely different structure, probably metabolised by "chopping up" the double bonds and the amide. Piperine can be converted to Piperonal which is used to synthesize MDMA, but it's a multistep process unlikely to be performed by smaller producers, but it certainly doesn't happen in-vivo.
Here are some old ramblings on the BZP family hosted by Rhodium. As it's never been HTML'ed there may be doubts as to accuracy (but not necessarily).
I had a little bottle of something called black pepper extract found it quiet good like some sort of mdma. had no bad come down or side effects. was a yellow liquid about 30ml
my experiences with it have always been quite positive, a bit like a kind of trippy speed
the comedown for me has always just bn a small period of bored restlessness with an incredible desire to pick my skin then gradually a long sleep
ive always taken way more than the suggested dose - my highest dose was 600 mg which gave me extreme visuals but also made me vomit, definite sign of 'had enough'
i think this (new zealand) is one of the only countries its legal in nowdays
i have had this stuff a bunch of times but the place i bought it from no longer stocks it. i ahve always had a good time and everytime i have had it has been with large quantities of alcohol involved and i ahve not had any negative effects as a result. i have also had it with some mdma and felt quite nautious for a while but felt a million $$$ once the nausea had subsided. most i have ever consumed has been 70mls and all i can say is that it really made me dance the night away
I had one of these once, and i felt really happy, everything was great, i felt love for my fellow man and some women, higher music appreciation, increased heart rate.
Wait, maybe im confusing ecstasy with crushed fucking pepper
just take a pill you damn hippies
^^^ It isn't crushed pepper at all. BZP is a purely synthetic chemical that has a similar structure to the piperazine compounds found in pepper. It is far from herbal and far from XTC. It is a crappy drug IMO, last way too long, really harsh body feeling. Come down lasted two to three days..... yeech