U-49900
Discover related
2 sources
A substance that is an analogue of U-47700, yet doesn't share much with it. If you are interested in trying it, I recommend reading this. https://www.reddit.com/r/researchchemicals/comments/5gbo3e/u49900_experiment_and_warning/
Source: TripSit — U-49900 ↗
Fact-sheets from PsychonautWiki. Harm-reduction reference only — not medical advice.