Back in the 60's, Lederle (proneounced: led-rr-lee) Laboratories, a leading drug company, would have the same prefix for many of their trademarked drugs. They were all prefixed with Leder: Ledercillian, Ledermycin, Lederject, Ledercort, Lederfolin, Ledertrexate and so one. They even came up with a birth control drug, called it Lederalone.