Devos II

From Memory Alpha, the free Star Trek reference.

Devos II is a planet in the Devos system, home to a Son'a outpost during the 2370s. During the Dominion War a ketracel-white storage facility was built there.

In 2375, the Federation learned of the existence of the storage facility. Due to this, Weyoun was forced to dispatch Dominion forces to defend the outpost rather then pursue the USS Defiant fleeing the area. (DS9: "Penumbra")