Good in that the naptha caught a lot of alkaloids, but bad in that you'll probably end up with very yellow results. Also, I highly recommend you not evaporate your yield entirely, and do a freeze precipitation instead. SWIM evaporated his first pull and found that the results were not only very yellow, but it was exceedingly difficult to remove from the evaporation dish. It was not a powder like SWIM had assumed it would be. He ended up with a lot of oily puddles that wouldn't evaporate, and they stuck to all the other residues, making the entire yield useless. (This was rectified by dissolving the mass in warm naptha and freeze precipitating it.)
Here's SWIM's freeze precipitation method: Let the naptha evaporate until you have less than 15% of the original volume; if you're using 50ml, evaporate enough so that you can fill a shot glass less than a fifth of the way full. Keep a close eye on your evaporation dish, and keep it just slightly angled so that all the liquid is pooled together. Move the liquid around after it has mostly evaporated and look on the glass; if you see pinholes in the residue (these are the beginnings of crystals), then the spice is getting too concentrated to stay in solution, and you should move the remaining liquid into the fridge/freezer as soon as possible. On SWIM's last pull (it was the 5th in the series), which was over 300mL of naptha, he reduced it to slightly less than a shot glass, and got 300mg of spice. (He used 5x as much of everything as you did).