Delta 9 THC
There are two types of Delta-9, hemp-based and cannabis-based.
Hemp-based is just like regular Delta-9 from the cannabis plant, but hemp contains less than 0.3% of it at its dried weight.
Because it's an identical chemical to the Delta-9 that comes from cannabis, it will still produce that high feeling many THC users seek. This means that because it is hemp-derived Delta-9, it is protected under the 2018 Farm Bill, provided it meets the concentration requirement.