if you take a look at the date which he posted. Back then it wasn't known why there was pyrrolidine so thats a pretty valid guess with the information at hand at the time
Yeah, agreed.
But my conclusion from this fact is that in the near future the last desirable psychoactives left for experimentation will be the ones which are difficult to synthesize (...and thus remain secret from public access). Sad, really sad that this devcelopment is so predictable to such an extend.