With research chemicals, especially new and novel ones, you obviously have no way to determine what you are really receiving. That aside, new RCs often have wildly varying reports, and potency data is especially sketchy and often based on animal data, cell cultures, wishful thinking, and outright fabrication.
that said, etazene is an analog of another research chemical that at least has a scientific paper or two and has been linked to deaths.
I don't really like to name names for RCs, and anyone even remotely considering them should research MPTP and locked-in syndrome for an extreme example of what can happen when chemistry outpaces pharmacology and medical testing.