The 2:3 mix of MEK:heptane works WAY BETTER than ethyl acetate. Don't even bother with ethyl acetate. Mix the resulting goo thoroughly in MEK:heptane, then pour off the solvent leaving behind the brown/amber junk, then evaporate the solvent. You should get crystals. Repeat this with new solvent until no more bufotenine is recovered from the goo.