Doesn't black pepper contain a small amount of safrole as well? Like 0.6 - 1.0%? The synths I have seen always extract the piperine and convert it to piperonal. The one I am looking at right now got 1 gram of piperonal from 100g of black pepper, and it took a lot of time and effort. But if pepper really has a 0.6%-1.0% safrole content, they could have gotten almost a gram of safrole from the same 100g of black pepper, presumably with less time and trouble.
Any thoughts on this?