Woolmer, I'm looking to bioassay the small amount of 'bufo benzoate' I believe I pulled soon just to confirm its active.

If you give it ago it may be as simple as:

-heat seeds in pan (to destroy impurities, DMT and 5meo traces).

-grind up the seeds 

-make a sodium carb paste 

-dry it

(-maybe defat with naphtha or room temp xylene maybe?)

-pull with heated limo

-salt with benzoic acid

-filter (and clean with fresh limo or maybe EA?)

-dry and collect

This will depend on how well limo pulls however.

But it leaves the door open to other solvents and benzoic acid combinations if this is indeed active.