I thought it was principally made of vegetal oils, since I haven't defated before to basify. I nevertheless discarded the oily residue after having performed 4 recrystallizations, in order to pull as much alkaloids as possible. The oily residue was very limited in quantity, perhaps between 50 and 100mg, I didn't weight it. I asked myself afterward if it wasn't some kind of jim-jam but since I only used naphta, I tought it was impossible  . Was it?