Ning has given some serious thought of late to acetaminophen as a more useful precursor than it is given credit to be. So ning has learned something about the stuff. The phenol group would probably salt with NaOH used to basify the mix, and that makes it much more soluble. Swin recrystallized some nice hydrolyzed acetaminophen crystals taking advantage of this property. (10 seconds in the microwave, bay-bee...)
Ning wonders if dxm and pe will base at different pHs? With careful control, it should be easy to do.
In the area ning's demented friend lives, 12oz of the pseudo-laced cocktail goes for about 5 us dollars. Ning's friend thinks that it would be best to get double benefits for the money spent, by extracting both alkaloids.
30mg pe / 5mL of syrup, if ning remembers correctly.