The Selcundi Drema sector (also referred to as the Selcundi Drema quadrant), contains at least one star system with five planets. The planet Drema IV, is the home world of Starfleet doctor Sarjenka and had dilithium deposits that were strangly distributed. (TNG episode: "Pen Pals"; SCE eBook: Progress; TNG novel: Q & A)
External links
Selcundi Drema sector article at Memory Alpha, the wiki for canon Star Trek.