Question about pro-ten vs. the tren phs you find in the u.s.

[totalflexblog]

I think Pro-Tren is 19-norandrosta-4-9,diene-3,17-dione

My understanding is that estra-4,9-diene-3,17-dione is the active in DN's Tren-Dione.

...which is exactly the same thing.