Dolamide

From Memory Alpha, the free Star Trek reference.

Dolamide is a versatile chemical-based energy source used in such technology as power generators, transporters, and short-range transports. In extremely pure form, dolamide can also be used to manufacture weapons.

The Valerians supplied the Cardassians with weapons-grade dolamide in the 2360s. (DS9: "Dramatis Personae")