Interesting paper.
It was mentioned in the other thread.
As I posted there, they did not use reference standards, they used retention time (and UV spectra?) with HPLC-UV. Also when testing with LC-MS they did NOT seem to detect psilocybin (but based on spectra found 5-MeO-DMT, 5-MeO-NMT and 5-MeO-Tryptamine), which makes me wonder how reliable those results are.
Anyways definitely interesting.
I'm attaching the full paper.