My guess is that drug companies are trying to keep it secret. I think thats fucking bullshit that some drug company could patent THC. Marijuana has been around for centuries they seem to think that they can just take plants extract the components and say that they own the compound and no one else can sell it or manufacture it without there involvemnet and approval.

It's sort of like the first people that got rich off oil. All they were just some morons who figured out how to pump the oil out of the ground, crack it and refine it. You ever seen the Beverly Hillbillies? We'll they look like the Bush administration if you ask me.