four cardinal principals
Tetrapharmakos
Yes, here is Tsouna on that section:
"The expression τὰ τέτταρα refers to the Fourfold Remedy. We suggest that it should be distinguished from τὰ κυριώτατα (1. 8). τὰ τέτταρα are precisely four principles originally expressed by Epicurus and later constituting the Fourfold Remedy. On the other hand, the term κυριώτατα in its technical sense is intended to cover all the fundamental principles pertaining to a certain subject and enabling the Epicurean student to confront particular problems and to solve them on his own."