Where does poisonous “oil of taggit” come from?

Is there any lore in D&D, whether in 5th Edition or prior, about where the poison "oil of taggit" comes from? What kind of thing is a "taggit"? An animal or plant? A mineral? In 5th Edition, it’s listed in the Dungeon Master’s Guide on page 258, but as far as I can tell, it’s been in the game since at least 3rd Edition, and possibly before.

I know what effect taggit oil has — it causes long-term unconsciousness — but I can’t find any information about what it is derived from, nor any etymology that might shed light on the question.