Nitrilin

Nitrilin was an explosive compound used in bombs in similar devices. In 2371, Elim Garak detonated a nitrilin device in his tailor shop, making it appear he was the target of an assassination attempt. 

Nitrilin was one of the components used in the bomb detonated at the Antwerp Conference in 2372. It was also used in a copycat bombing at Starbase 375 a short time later. (: The Oppressor's Wrong)