PROVIGIL (modafinil) is a wakefulness-promoting agent for oral administration. Modafinil is a racemic compound. The chemical name for modafinil is 2-[(diphenylmethyl)sulfinyl]acetamide. The molecular formula is C15H15NO2S and the molecular weight is 273.35.
Elephant grass is a robust, rhizomatous, tufted perennial grass. It has a vigourous root system, developing from the nodes of its creeping stolons. The culms are coarse, perennial, and may be up to 4-7 m in height, branched above. Elephant grass forms dense thick clumps, up to 1 m across.
Grass frogs, also known as common frogs, are a common semiterrestrial frog that typically dwells in the grass. Common in Europe and also in some U.S. states, grassfrogs are insectivorous, semi-aquatic, web-footed amphibians with smooth skin and long hind legs.Source: TheFreeDictionary.rom Wikipedia :Grassfrog or  grass frogs  are usually members of the tree frog family (Hylidae), in particular of the genus Litoria.