Molecular biologist Rodrigo Moura Neto, who works in a laboratory on the University campus in Rio de Janeiro recently discovered cannabidiol, a compound in marijuana known as CBD, in the Trema micrantha Blume, a common Brazilian plant. CBD has shown promise as a treatment for conditions including epilepsy, autism, anxiety and chronic pain. Crucially, Moura Neto also found “Trema” does not contain the other main ingredient in pot, tetrahydrocannabinol, or THC -- the substance that makes people high. IMAGES AND SOUNDBITES