Molocine was an element used by extremely advanced civilizations. The Federation was unable to shape it as of 2367. (Star Trek: The Prospect Chronicles: "The Burnt Child", "Starry, Starry Night") In late 2366, an away team from the USS Worsaae discovered an artifact made of molocine on an archaeological expedition on Matanda. (Star Trek: The Prospect Chronicles: "The Burnt Child")