These newer generation compounds are no joke and I've discussed my reservations about them ad nauseam (here and here and here and here and here). We know nothing of their pharmacology and toxicology. Most of the newer research chemicals are nothing but mix-and-match versions of earlier chemicals or what I like to say is a chemical grab bag o' fun.
The earlier reported outbreak of illnesses related to synthetic cannabinoid use in Texas still hasn't been resolved or at least a chemical has not been identified and its identity released to the media.
As always, if I hear any more information, I'll update.