Rintanna is a planet in the Gamma Quadrant and the homeworld of the Rintannan.
In 2376, Taran'atar used a holosuite program where he encountered the Rintannan, making Kira Nerys wonder if the planet was depicted was Rintanna itself. (DS9 - Mission Gamma novel: Twilight)
Later in 2376, a revolt started on Rintanna. Vannis was involved in the Dominion response to the revolt. (DS9 - Worlds of Star Trek: Deep Space Nine novel: The Dominion: Olympus Descending)