It's probably just an experimental compound. I could only find the same info you guys already did. There is literally millions of different versions of opiates that have been created by experimenting with the known compounds. Just look up analogs of fentanyl, they have created some versions of fentanyl so strong the only use it to tranquilize huge animals such as elephants. From the sounds of it I wouldn't want mess it, anything that has that high of an affinity for opie receptors probably would have a beast of a WD. Or maybe even something worse cause they suggest that it binds to the receptors in way that is unique to most opies.