"THC or delta-9-tetrahydrocannabinol is by far the most well-known cannabinoids, but certainly isn’t the only powerful chemical compound native to the cannabis flower. Delta-8-THC, one of the four most common cannabinoids, is similar to its psychoactive relative THC, but with several key differences."
E.g., "Delta-8-THC is chemically different from delta-9-THC by only a few atomic bonds and still offers a potent high of its own. While delta-8-THC only exists naturally in fractions of a percent, companies are finding value in concentrating esoteric cannabinoids for their unique effects and applications.
Oleum Extracts, a top-tier cannabis extractor in Washington State, is currently producing an 'AquaTek Delta-8 THC” distillate cartridge that demonstrates these properties'."
What Is Delta-8-THC and How Is It Different from Delta-9? | Leafly
Delta-9 THC may be the most common cannabinoid, but it is certainly not alone. Learn more about its close cousin, Delta-8 THC.