In the Low Countries, large-scale production units don't always have to take care of their precursor materials, only for (more or less) OTC products. Organized crime delivers you the precursor material and pays the chemist to cook them some MD(M)A. It's because of the involvement of organized crime and profit-only attitude that I totally dislike this way of working. But whatever, it's the way things are over there.
Consequently, watching products as sassafras oil doesn't work that well (over there)... A couple of years ago, a Dutch farmer was busted. They traced him since he ordered massive amounts of sulfuric acid. He raised pigs, ordering sulfuric acid is very common for pig farmers, but not for the amounts he ordered. The Dutch police checked out his farm, and what did they find? Nothing! Exactly, absolutely nothing. However, the Dutch police watched him during his daily activities. Nothing special. But it was very odd that he drove his tractor in the middle of the night into the fields. They checked out what he was doing there, and yes... the pig farmer had a large-scale underground (!) XTC lab. This story was in the newspapers many years ago. Still, it is one of these stories one nevers forget
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Ave Hive, synthetisandi te salutant!