Synovex has estradiol-benzoate in it...
Also, I think this compound is on the banned list...very suprised they would use this nomenclature, nontheless.
EDIT:
Just looked closely at the product. Based on the winny/hardening/pre-contest comparisons, I'm sure its a 5AA product, i.e. DHT precursor. Problem is, it looks to me to be quite underdosed. You're going to see more from the other things in the product, IMO. And the Guarana (caffeine) in there with the Arginine Ester is going to make it "feel" like its working, if you take it pre-workout as recommended.