You can't just identify something by looking at a compound. You need to run tests for that.
See Kane has been tested many times.
His RU has been tested several times as his CB-03-01. It always came out 99% pure.
@hilbert also recently tested his setipiprant, and confirmed it was 99% pure.
Hell, his RU has even been tested by a forum members of alopezie.de in a solution who said that the RU was stable and pure.
The customs of Poland (the government) even tested a big batch of his RU and identified it as having 99% purity. Ask Ziom, co-owner of group-buys.eu, the polish guys often did group buy with kane and always tested his stuff.
Ziom is legit too btw.
Here is a example of a test report of RU and CB from kane done by a forum member, not going to dig up everything;
https://www.pdf-archive.com/2016/11/27/koptri-132073-h-nmr/koptri-132073-h-nmr.pdf
Off course there are people who;
- Believe it's not real because it doesn't work for them. Well guess what, it's not some magical compound. For many people finasteride doesn't work too. Shall we assume finasteride is fake too then?
- Spread nonsense (competitors).