There's been some discussion on this Board as to the meaning of the words "chemically or pharmacologically related compounds." Those words appear at the bottom of the lists of steroids and stimulants, which lists are part of what is sometimes referred to as the "banned list." But if you look at the banned list, you'll see that each category starts with the name of the category (the first is Anabolic Androgenic Steroids) after which are the letters e.g.
What this suggests to me is that the list is not inclusive. If a substance is an Anobolic Androgenic Steroid, it's banned, whether or not it's specifically named on the list and whether or not it is chemically or pharmacologically related to a substances that is named on the last.
I realize that this conclusion could be made more clear. But I think it's clear enough. The use of "e.g." after every category heading obviously is intended to mean that the list is only a list of examples, not a complete list of every possible substance in the category. It's the category itself that defines what is banned.
So if THG is a steroid, and modafinil is a stimulant, those substances are banned, even though they have not previously been specifically named on the list.