I assume your talking about synovex(test prop and estradiol). Get an anti-test kit from animal and it will take out the estradiol but destroys the prop ester so you will be left with test suspension in oil.
Someone correct me if I'm wrong, but I think animals kit only removes something like 80% of the estradiol. So even if you do everything right (which is never a given) you'll still be pounding in some e-diol.