Delta 9 THC is the most common compound in the cannabis plant comprising up to 35% of flower weight. Title is...strange. I was expecting to read about some minor accessory cannabinoid.
You seem to have confused “unique” with “minor”. Delta 9 THC may be common in cannabis, but it is unique to cannabis. The title isn't weird at all.
Also, delta 9 THC may be the most common cannabinoid in cannabis (well, in one of three major chemotypes), but it's not the most common compound in the cannabis plant.
Also, delta 9 THC may be the most common cannabinoid in cannabis (well, in one of three major chemotypes), but it's not the most common compound in the cannabis plant.